Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (5)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=luminescence<.>)

Общее количество найденных документов : 189
Показаны документы с 1 по 20

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrovsky A. S., Gudim I. A., Krylov A. S, Temerov V. E.
Заглавие : Luminescence of manganese ions in yttrium aluminium borate
Место публикации : 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, Lyon, 2008, p.482
Найти похожие

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Malakhovskii A. V., Edelman I. S., Sokolov A. Е., Sukhachev A. L., Temerov V. L., Gnatchenko S. L., Kachur I. S., Piryatinskaya V. G., Valiev U. V.
Заглавие : Optical absorption and luminescence of Tm3+ and Yb3+ ions in huntite structure
Место публикации : Республиканская конференция «Оптические методы в современной физике», Ташкент, Узбекистан, 2008, с. 33-35
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhou G., Wang Y., Mao Y., Guo C., Zhang J., Molokeev M. S., Xia Z., Zhang X.-M.
Заглавие : Temperature/component-dependent luminescence in lead-free hybrid metal halides for temperature sensor and anti-counterfeiting
Колич.характеристики :9 с
Место публикации : Adv. Funct. Mater. - 2024. - Vol. 34, Is. 34. - Ст.2401860. - ISSN 1616301X (ISSN), DOI 10.1002/adfm.202401860. - ISSN 16163028 (eISSN)
Примечания : Cited References: 89. - G.J.Z. and Y.T.W. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (No.52202177, 22271211), Fundamental Research Program of Shanxi Province (No.20210302124054), Science and Technology Innovation Project of Colleges and Universities in Shanxi Province (No.2021L262), 1331 Project of Shanxi Province, Postgraduate Innovation Project of Shanxi Province (No.2023KY462), and supported by the Ministry of Science and High Education of Russian Federation (No.FSRZ-2023-0006). The authors would like to thank Prof. Haijun Jiao, Leibniz-Institut für Katalyse e.V., Germany, for the theoretical support on the electron-transition mechanism
Аннотация: Hybrid metal halides (HMHs) have emerged as a promising platform for optically functional crystalline materials, but it is extremely challenging to thoroughly elucidate the electron transition coupled to additional ligand emission. Herein, to discover sequences of lead-free HMHs with distinct optically active metal cations are aimed, that is, Sb3+ (5s2) with the lone-pair electron configuration and In3+ (4d10) with the fully-filled electron configuration. (Me2NH2)4MCl6·Cl (Me = −CH3, M = Sb, In) exhibits the superior temperature/component-dependent luminescence behaviors resulting from the competition transition between triplet-states (Tn-S0) self-trapped excitons (STEs) of inorganic units and singlet-state (S1-S0) of organic cations, which is manipulated by the optical activity levels of [SbCl6]3− and [InCl6]3−. The bonding differences between Sb3+/In3+ and Cl− in terms of electronic excitation and hybridization are emphasized, and the different electron-transition mechanisms are established according to the PL spectra at the extreme temperature of 5 to 305 K and theoretical calculations. By fine-tuning the B-site Sb3+/In3+ alloying, the photoluminescence quantum yield (PLQY = 81.5%) and stability are optimized at 20% alloying of Sb3+. This research sheds light on the rules governing PL behaviors of HMHs, as well as exploring the optical-functional application of aviation temperature sensors and access-control systems.
Смотреть статью,
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Banerjee S., Saikia S., Molokeev M. S., Nag A.
Заглавие : Unveiling temperature-induced structural phase transition and luminescence in Mn2+-doped Cs2NaBiCl6 double perovskite
Колич.характеристики :8 с
Место публикации : Chem. Mater. - 2024. - Vol. 36, Is. 9. - P.4750-4757. - ISSN 08974756 (ISSN), DOI 10.1021/acs.chemmater.4c00514. - ISSN 15205002 (eISSN)
Примечания : Cited References: 49. - Authors acknowledge Dr. Arup Rath’s lab NCL Pune and SAIF-IIT Bombay for diffuse reflectance spectroscopy and ICP-AES measurements, respectively. A.N. acknowledges Science & Engineering Research Board, India, for Swarnajayanti Fellowship (SB/SJF/2020-21/02), and BRICS grant (e-27558) of the Department of Science and Technology, India. Authors acknowledge the Department of Science and Technology India (FIST program, SR/FST/CS-II/2019/105) for temperature-dependent powder XRD and EPR data. S.B. is grateful to IISER Pune for a research fellowship. S.S. acknowledges Prime Minister’s Research Fellowship (PMRF), Ministry of Education, India. M.M. acknowledges the Russian Science Foundation, grant 24-43-00006
Аннотация: Halide double perovskites like Cs2NaBiCl6 are good host materials for luminescent dopants like Mn2+. The nature of photoluminescence (PL) depends on the local structure around the dopant ion, and doping may sometimes influence the global structure of the host. Here, we unveil the correlation between the temperature-induced (global) structural phase transition of Mn2+-doped Cs2NaBiCl6 with the local structure and PL of the Mn2+ dopant. X-ray diffraction analysis shows Mn2+-doped Cs2NaBiCl6 is in a cubic (Fm3m) phase between 300 and 110 K, below which the phase changes to tetragonal (I4/mmm), which persists at least until 15 K. The small (∼1%) doping amount does not alter the phase transition behavior of Cs2NaBiCl6. Importantly, the phase transition does not influence the Mn2+ d-electron PL. The PL peak energy, intensity, spectral width, and lifetime do not show any signature of the phase transition between 300–6 K. The hyperfine splitting in temperature-dependent electron paramagnetic spectra of Mn2+ ions also remain unchanged across the phase transition. These results suggest that the global structural phase transition of the host does not influence the local structure and emission property of the dopant Mn2+ ion. This structure–property insight might be explored for other transition-metal- and lanthanide-doped halide double perovskites as well. The stability of dopant emission regardless of the structural phase transition bodes well for their potential applications in phosphor-converted light emitting diodes.
Смотреть статью,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ma Y., Liao W., Quan B., Kong Z., Molokeev M. S., Zolotov A., Cheng M., Chen X., Zhou Zh., Xia M.
Заглавие : Solid solution structural engineering enhances the luminescence of SrMgAl10O17:Cr3+ for agricultural lighting
Колич.характеристики :7 с
Место публикации : J. Lumin. - 2024. - Vol. 270. - Ст.120553. - ISSN 00222313 (ISSN), DOI 10.1016/j.jlumin.2024.120553. - ISSN 18727883 (eISSN)
Примечания : Cited References: 46. - The authors would like to gratefully acknowledge funds from the Key R & D Projects in Hunan Province (2021SK2047, 2022NK2044), the Wangcheng Science and Technology Plan (KJ221017), the Science and Technology Innovation Program of Hunan Province (2022WZ1022). The work was supported by the Ministry of Science and Higher Education of the Russian Federation as part of the World-class Research Center program: ‘‘Advanced Digital Technologies’’, contract no. 075-15-2020-935. Research Foundation of Education Bureau of Hunan Province, China (22B0211)
Аннотация: Lead-free non-rare earth oxide phosphors have attracted wide attention due to their environmental protection, sustainability, and potential to replace halides and fluorides in the field of plant lighting. Among them, the Cr3+-excited aluminate phosphor exhibits high brightness, high thermal stability, and far red to near-infrared (NIR) emission due to the influence of the crystal field strength (CFS). This property gives rise to a variety of strategies used to modulate the CFS, for example, single ion substitution, chemical unit co-substitution, etc. Here, we chose the substitution of a single ion, with [BaO6] gradually replacing [SrO6] to form a solid solution. Their structural characteristics and the local structure of Cr3+ are studied and discussed. The device is packaged to evaluate the feasibility of the material for practical application. The prepared phosphor had a bright far-red light emission of 693 nm under blue light excitation, and this spectrum strongly matched the absorption of plant phytochrome PFR. This work provides the design principle of far red light emission activated by Cr3+ aluminate solid solution, which can inspire further research on pc-LED lights for plant lighting.
Смотреть статью,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Oreshonkov A. S., Aleksandrovsky A. S., Chimitova O.D., Pankin D.V., Popov Z.I., Sukhanova E.V., Molokeev M. S., Adichtchev S.V., Pugachev A.M., Nemtsev I. V.
Заглавие : Solid state synthesis, structural, DFT and spectroscopic analysis of EuAl3(BO3)4
Колич.характеристики :10 с
Место публикации : Mater. Chem. Phys. - 2024. - Vol. 320. - Ст.129400. - ISSN 02540584 (ISSN), DOI 10.1016/j.matchemphys.2024.129400. - ISSN 18793312 (eISSN)
Примечания : Cited References: 55. - The work was carried out within the state assignment No FWES-2024-0003 of Kirensky Institute of Physics. This work was partially supported by the state order of BINM SB RAS (0273-2021-0008). The samples for this research were synthesized using equipment of the CCU BINM SB RAS. The reflectance spectrum was obtained at the Center for Optical and Laser Materials Research of Research park of St. Petersburg State University. The SEM measurements were performed at Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: Huntite-like borates are versatile and promising materials with wide range of applications in frequency conversion, UV light generation, lighting, displays, quantum information storage, and more, demonstrated by their various properties and uses in scientific research. In this work, EuAl3(BO3)4 powder was prepared through multi-stage solid-state reaction method using high-purity starting reagents: Eu2O3, Al2O3 and H3BO3, considering a 20 wt% excess of H3BO3 to compensate for B2O3 volatilization. Obtained samples undergo several treatments at varying temperatures and their phase purity is subsequently verified through powder X-ray diffraction analysis. The scanning electron microscopy reveals that resulting EuAl3(BO3)4 powder consists of granules exhibiting irregular morphologies with dimensions of 0.5–8 μm. The electronic band structure of EuAl3(BO3)4, calculated using the GGA PBE method, reveals f-states of Eu near 4 eV. These states do not produce emphasized peaks on simulated absorbance spectra. Using of DFT + U for the f-states of Eu pushed up f-bands above 6 eV and the charge transfer from p-O to d-Eu was obtained (Egdirect = 5.63 eV, Egindirect = 5.37 eV using Ueff = 4 eV). The variation of Ueff has a weak influence on the position of the bottom of the conduction band. The experimental bandgaps of EuAl3(BO3)4 crystalline powder, both direct and indirect, are found to be 3.96 and 3.67 eV, correspondingly. These values are lower than theoretical values what is associated with limitations of DFT calculations involving f electrons. The Raman spectrum of EuAl3(BO3)4 powder is discussed, detailing the contributions of different ions to specific spectral bands. Investigation of high-resolution luminescence spectra shows the possibility to estimate the content of defects by the testing the violation of the prohibition of ultranarrow 5D0 → 7F0 line that is forbidden in the ideal crystalline structure of trigonal EuAl3(BO3)4.
Смотреть статью,
WOS,
Читать в сети ИФ
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Liu Sh., Li L., Qin X., Du R., Sun Y., Xie Sh., Wang J., Molokeev M. S., Xi Sh., Bunzli J.-C. G., Zhou L., Wu M.
Заглавие : Achieving ultra-broadband sunlight-like emission in single-phase phosphors: The interplay of structure and luminescence
Колич.характеристики :9 с
Место публикации : Adv. Mater. - 2024. - Ст.2406164. - Article in press. - ISSN 09359648 (ISSN), DOI 10.1002/adma.202406164. - ISSN 15214095 (eISSN)
Примечания : Cited References: 43. - S.L. and L.L. contributed equally to this work. This work was ﬁnancially supported by grants from the National Natural Science Foundationof China (NSFC, No. 52272174) and its joint project with Guangdong(Nos. U22A20135, U1801253 and U1301242) Province. J. Wang acknowl-edges Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) projects SML2021SP204, SML2023SP215/218/238. The authorsare grateful to Prof. Peter A. Tanner and Prof. Ka-Leung Wong for the indepth communication and valuable advice on the improvement of the manuscriptOpen access funding provided by Ecole Polytechnique Federale de Lausanne
Аннотация: The quest for artificial light sources mimicking sunlight has been a long-standing endeavor, particularly for applications in anticounterfeiting, agriculture, and color hue detection. Conventional sunlight simulators are often cost-prohibitive and bulky. Therefore, the development of a series of single-phase phosphors Ca9LiMg1-xAl2x/3(PO4)7:0.1Eu2+ (x = 0-0.75) with sunlight-like emission represents a welcome step towards compact and economical light source alternatives. The phosphors are obtained by an original heterovalent substitution method and emit a broad spectrum spanning from violet to deep red. Notably, the phosphor with x = 0.5 exhibits an impressive full width at half-maximum of 330 nm. A synergistic interplay of experimental investigations and theory unveils the mechanism behind sunlight-like emission due to the local structural perturbations introduced by the heterovalent substitution of Al3+ for Mg2+, leading to a varied distribution of Eu2+ within the lattice. Subsequent characterization of a series of organic dyes combining absorption spectroscopy with convolutional neural network analysis convincingly demonstrates the potential of this phosphor in portable photodetection devices. Broad-spectrum light source testing empowers the model to precisely differentiate dye patterns. This points to the phosphor being ideal for mimicking sunlight. Beyond this demonstrated application, the phosphor's utility is envisioned in other relevant domains, including visible light communication and smart agriculture.
Смотреть статью,
Scopus,
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolesnik O. V., Grabovoy A. S., Badun G. A., Churilov G. N., Kudryasheva N. S.
Заглавие : Radioprotective properties of fullerenol: Cellular, biochemical and physicochemical approaches
Колич.характеристики :10 с
Место публикации : Eurasian J. Chem. - 2024. - Article in press. - ISSN 29590663 (ISSN), DOI 10.31489/2959-0663/3-24-9. - ISSN 29590671 (eISSN)
Примечания : Cited References: 65. - This research was funded by the Russian Science Foundation No. 23-26-10018, Krasnoyarsk Regional Science Foundation. The purification of enzymes was supported by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation, project No. FWES-2024-0018
Аннотация: The search for optimal radioprotective methods and tools under low-dose radiation exposures represents a pressing issue in the field of modern radioecology. The objective of the study was to investigate the radioprotective properties of fullerenol C60,70Oy(OH)x, (x+y = 24–28), a water-soluble polyhydroxylated fullerene derivative with an electron-deficient aromatic carbon structure. Tritium, a radionuclide of low decay energy, was selected to simulate an exposure to low-dose irradiation (˂ 0.05 Gy). We applied luminous marine bacteria Photobacterium phosporeum as a model cellular object to monitor radiation bioeffects; the bioluminescence intensity of the bacteria was used as a tested biological parameter. Tritium activated the bacterial luminescence; the addition of fullerenol (˂ 3∙10–3 g/L) “mitigated” the activation, thus revealing the radioprotective capacity of fullerenol for the marine microorganism. To evaluate the mechanisms of radioprotection of fullerenol in tritiated water, we investigated the effects of fullerenol on: (1) the content of reactive oxygen species and (2) the intensity of bioluminescence in the bacterial enzymatic reaction. Tritiated water produced moderate deviations from the control values, whereas the addition of fullerene brought these values closer to the ‘control’ ones. All observed effects were attributed to variations in the ionic balance of the aqueous medium, which resulted in the activation of bacterial functions through cell membranes.
Смотреть статью
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Титов Р. А., Смирнов М. В., Бобрева Л. А., Теплякова Н. А., Палатников М. Н., Бирюкова И. В., Маслобоева С. М., Крылов, Александр Сергеевич, Втюрин, Александр Николаевич, Сидоров Н. В.
Заглавие : Оптические свойства, структурная однородность и дефектные центры монокристаллов двойного легирования LiNbO3:Zn:Mg, полученных по разным технологиям
Колич.характеристики :18 с
Место публикации : Перспективн. материалы. - 2024. - № 8. - С. 5-22. - ISSN 1028978X (ISSN), DOI 10.30791/1028-978X-2024-8-5-22
Примечания : Библиогр.: 60. - Работа выполнена при частичной финансовой поддержке правительства Мурманской области научно-исследовательских проектов молодых учёных (№ 201 от 27 ноября 2023 г.) и в рамках государственного задания Министерства науки и высшего образования РФ (регистрационный номер FMEZ-2022-0016)
Аннотация: Методами спектроскопии комбинационного рассеяния света, инфракрасной спектроскопии поглощения, фотолюминесценции, лазерной коноскопии и фотоиндуцированного рассеяния света исследованы особенности дефектной структуры номинально чистого кристалла LiNbO3стех и монокристаллов двойного легирования LiNbO3:Zn:Mg (3,45:1,41 мол. %) и LiNbO3:Zn:Mg (3,45:1,22 мол. %), полученных по технологии гомогенного и прямого легирования. Кристаллы двойного легирования LiNbO3:Zn:Mg, полученные по разным технологиям, обладают высоким сопротивлением повреждению лазерным излучением. Кристалл LiNbO3:Zn:Mg (3,45:1,22 мол. %), полученный по технологии прямого легирования, характеризуется более низкой композиционной однородностью по сравнению с кристаллом LiNbO3:Zn:Mg (3,45:1,41 мол. %), полученным по технологии гомогенного легирования. По спектрам комбинационного рассеяния света обнаружено, что особенности дефектной структуры кристаллов двойного легирования LiNbO3:Zn:Mg в большей степени определяет примесь магния. Обнаруженный факт может быть причиной преобладания влияния упорядочивающего механизма катионов магния (~ 1,22 – 1,44 мол. %) над влиянием разупорядочивающего механизма катионов цинка (~ 3,45 мол. %) на особенности структурных единиц катионной подрешетки. Наименьшее значение концентрации ОН-групп и интенсивности фотолюминесценции в ближней ИК области характерно для кристалла LiNbO3:Zn:Mg (3,45:1,41 мол. %), полученного по технологии гомогенного легирования.Features of the defect structure of a nominally pure LiNbO3stoich crystal and doubly doped LiNbO3:Zn:Mg (3.45:1.41 mol. %) and LiNbO3:Zn:Mg (3.45:1.22 mol. %) single crystals have been studied using Raman spectroscopy, infrared absorption spectroscopy, photoluminescence, laser conoscopy and photoinduced light scattering. The material for the study has been obtained using homogeneous and direct doping technology. It has been shown that double-doped LiNbO3:Zn:Mg crystals obtained using different technologies have high resistance to damage by laser radiation. However, the LiNbO3:Zn:Mg (3.45:1.22 mol. %) crystal obtained using direct doping technology is characterized by lower compositional uniformity compared to the LiNbO3:Zn:Mg (3.45:1.41 mol. %) crystal obtained using homogeneous doping technology. Raman spectra have showed that the features of the defect structure of double-doped LiNbO3:Zn:Mg crystals are largely determined by the magnesium impurity. This may be the reason that the influence of the ordering mechanism of magnesium cations (~ 1.22 – 1.44 mol. %) prevails over the influence of the disordering mechanism of zinc cations (~ 3.45 mol. %) on the features of the structural units of the cation sublattice. It has been found that the lowest concentration of OH groups and photoluminescence intensity in the near-IR region is characteristic of the LiNbO3:Zn:Mg (3.45:1.41 mol. %) crystal obtained using homogeneous doping technology.
Смотреть статью
Найти похожие

10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Parfenova E. V., Slyusarenko N. V., Kulagin S. V., Rogova A. V., Tomilin F. N., Slyusareva E. A.
Заглавие : Photophysical properties of luminophores based on 3-(1,3-benzothiazol-2-yl)-4-hydroxybenzenesulfonic acid
Колич.характеристики :6 с
Место публикации : Bull. Russ. Acad. Sci.: Phys. - 2024. - Vol. 88, Is. 6. - P.940-945. - ISSN 10628738 (ISSN), DOI 10.1134/S1062873824706858. - ISSN 19349432 (eISSN)
Примечания : Cited References: 25. - The authors are grateful to OLBO Company for the presented samplesThe work was supported by the Priority 2030 Program, the project "Design of New Luminescent Materials for Multifunctional Purposes", and the Grant Council of the President of the Russian Federation (project no. MK-995.2022.1.2)
Аннотация: Water-soluble organic luminophores based on 3-(1,3-benzothiazol-2-yl)-4-hydroxybenzenesulfonic acid were studied both experimentally and by density functional theory for the first time. Because of peculiarities in chemical structure, one of them has a large Stokes shift, which results from excited state intramolecular proton transfer.
Смотреть статью,
Scopus
Найти похожие

11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Su B., Molokeev M. S., Chen R., Zhang T.
Заглавие : Near-unity PLQY and high anti-thermal quenching red luminescence from one-dimensional hybrid manganese chloride for efficient and stable white light-emitting diodes
Колич.характеристики :8 с
Место публикации : J. Mater. Chem. C. - 2024. - Vol. 12, Is. 25. - P.9266-9273. - ISSN 20507526 (ISSN), DOI 10.1039/D4TC01477D. - ISSN 20507534 (eISSN)
Примечания : Cited References: 47. - The present work was supported by the National Science Foundation Committee of China (62105194), the Key Research and Development Program of Shaanxi Province, China (2024GX-YBXM-409), and the Russian Science Foundation, grant 24-43-00006
Аннотация: The discovery of novel Mn2+-based metal halides with excellent luminescence properties and thermostability is particularly of great importance for solid-state lighting (SSL). Herein, a novel one-dimensional hybrid manganese chloride (TMA)MnCl3 of a hexagonal system with a P63/m space group is synthesized via a simple saturation crystallization method. Under 443 nm excitation, (TMA)MnCl3 single crystals exhibit a strong broad-band red emission peak at 645 nm originating from the 4T1 → 6A1 transition of Mn2+ ions with a full width at half maximum of 99 nm and a photoluminescence quantum yield (PLQY) of 98.6%. Moreover, (TMA)MnCl3 shows a high anti-thermal quenching behavior, and the integrated PL intensity still retains 100% of the initial intensity measured at 300 °C, caused by the high structural rigidity. Benefiting from its strong blue light excitation, high PLQY, and excellent thermal stability, a stable white light-emitting diode device is fabricated by combining a 465 nm blue LED chip, green-emitting Lu3Al5O12:Ce3+ and the (TMA)MnCl3 red phosphor with a high color rendering index of 94.3% and a correlated color temperature of 3995 K. This work develops a novel hybrid manganese chloride red-emitter and paves a new path to explore high-performance phosphors excited by blue light for SSL.
Смотреть статью,
Scopus,
WOS
Найти похожие

12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chen H., Zhang Z., Mi R., Molokeev M. S., Liu Yu., Wang B., Mei L., Fang M., Wu X., Min X., Liu Ya.
Заглавие : Synergetic manipulation of components and multiple activator sites towards full-spectrum lighting in Eu2+-doped whitlockite phosphors for high color-rendering WLED
Колич.характеристики :9 с
Место публикации : J. Lumin. - 2024. - Vol. 275. - Ст.120795. - ISSN 00222313 (ISSN), DOI 10.1016/j.jlumin.2024.120795. - ISSN 18727883 (eISSN)
Примечания : Cited References: 47. - We acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 52104272 and 52072348), the Young Elite Scientists Sponsorship Program by CAST (2024QNRC001) and the Program National Key R&D Program of China (2021YFC1910602-01)
Аннотация: Tuning the components and multiple activator sites possesses profound significances on the regulation for corresponding luminescent properties of target phosphors. However, it is still challenging to realize full-visible emission via single activator in a single phase owing to the matrix diversity and uncertainty for multi-site occupation. Herein, we developed a family of whitlockite-type solid-solution phosphors Ca8MgGa1-yLay(PO4)7: Eu2+(y = 0–1) via inducing the La3+ ions into Ca8MgGa(PO4)7:Eu2+. The local environments of Eu2+ ions and corresponding tunable photoluminescent properties, decay times and thermal stability are revealed systematically in detail. Specially, the excitation and emission spectra of Ca8MgGa1-yLay(PO4)7: Eu2+ are broadened gradually, finally towards a full-visible emission with 152 nm bandwidth spectrum for the phosphor Ca8MgLa(PO4)7: Eu2+. WLED with a high color rendering index (CRI = 95) and low color temperature (CCT = 3764 K) was fabricated based on the full-visible emission Ca8MgGa0.2La0.8(PO4)7: 0.08Eu2+ phosphors under a 365 nm chip, indicating the prominent potentials for high-color-rendering WLEDs. These results in current work provide new ideas for synergetic manipulation of components and multiple activator sites towards a full-visible emission in single-phase applied for white lighting.
Смотреть статью,
Scopus,
WOS
Найти похожие

13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wang, Xuejiao, Feng, Xiaowen, Molokeev M. S., Zheng, Huiling, Wang, Qiushi, Xu, Chunyan, Li, Ji-Guang
Заглавие : Modulation of Bi3+ luminescence from broadband green to broadband deep red in Lu2WO6 by Gd3+ doping and its applications in high color rendering index white LED and near-infrared LED
Место публикации : Dalton Trans. - 2023. - Vol. 52, Is. 9. - P.2619-2630. - ISSN 14779226 (ISSN), DOI 10.1039/D2DT03751C. - ISSN 14779234 (eISSN)
Примечания : Cited References: 4. - This work is supported in part by the Project of Education Department of Liaoning Province (Grant No. LQ2019014) and he Natural Science Foundation of Liaoning Province (Grant No. 2020-MS-286). The authors are thankful for the support for the 4B9A Beamline from the Beijing Synchrotron Radiation Facility (BSRF) (Project No. 2021-BEPC-PT-005290). The authors would like to thank Siqi Liu from Shiyanjia Lab (
Аннотация: Phosphors that exhibit tunable broadband emissions are highly desired in multi-functional LEDs, including pc-WLEDs and pc-NIR LEDs. In this work, broadband emissions were obtained and modulated in the unexpectedly wide spectral range of 517–609 nm for (Lu0.99−xGdxBi0.01)2WO6 phosphors by tuning the Gd3+ content (x = 0–0.99). The effects of Gd3+ doping on phase constituents, particle morphology, crystal structure, and photoluminescence were systematically investigated. Broadband green emission was obtained from Gd3+-free (Lu0.99Bi0.01)2WO6 phosphors (x = 0), whose emission intensity was enhanced by 50% with 5 at% Gd3+ (x = 0.05). The phase transition happened when x 0.50 and the broadband red-NIR emission was obtained when x = 0.75–0.99. Three luminescence centers were proved to be responsible for the broadband green emissions via crystal structure, spectral fitting and fluorescence decay analysis. A pc-WLED with a high color rendering index (Ra = 91.3), a stable emission color, and a low color temperature (3951 K) was fabricated from the (Lu0.94Gd0.05Bi0.01)2WO6 broadband green phosphor, and an LED device that simultaneously emits high color rendering index white light and NIR light was obtained with the (Gd0.99Bi0.01)2WO6 broadband red-NIR phosphor. Night vision and noninvasive imaging were also demonstrated using the latter LED device.
Смотреть статью
Найти похожие

14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lyu, Kuangnan, Liu, Gaochao, Molokeev M. S., Xia, Zhiguo
Заглавие : Double-site occupation triggered broadband and tunable NIR-I and NIR-II luminescence in AlNbO4:Cr3+ phosphors
Место публикации : Adv. Phys. Res. - 2023. - Vol. 2, Is. 4. - Ст.2200056. - ISSN 27511200 (eISSN), DOI 10.1002/apxr.202200056
Примечания : Cited References: 38. - This research was supported by the International Cooperation Project of the National Key Research and Development Program of China (2021YFB3500400 and 2021YFE0105700), National Natural Science Foundations of China (Grant No. 51972118), Guangzhou Science & Technology Project (202007020005), the State Key Laboratory of Luminescent Materials and Devices (Skllmd-2022-02), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01×137). This work was also funded by RFBR according to the research project No. 19-52-80003
Аннотация: Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are desired for optoelectronic and biomedical applications, while the development of target broadband NIR phosphors still remains a significant challenge. Herein, a kind of Cr3+-doped AlNbO4 phosphors with a broad NIR emission ranging from 650 to 1400 nm under 450 nm excitation are reported. A giant red-shift emission peak from 866 to 1020 nm together with broadened full width at half-maximum of 320 nm is achieved simply by varying the doped Cr3+ concentrations. Structural and spectroscopy analysis demonstrate that a concentration-dependent site-occupation of Cr3+ emitters in different Al3+ sites is responsible for the tunable NIR luminescence. The as-fabricated NIR pc-LED based on optimized AlNbO4:Cr3+ phosphor exhibits great potential in night-vision applications. This work provides a novel design principle on the Cr3+-doped AlNbO4 phosphor with tunable broadband luminescence from NIR-I to NIR-II, and these materials can be employed in NIR spectroscopy applications.
Смотреть статью,
Читать в сети ИФ
Найти похожие

15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang, Zhiyu, Zhao, Yifei, Ueda, Jumpei, Molokeev M. S., Shang, Mengmeng, Xia, Zhiguo
Заглавие : Engineering charge-transfer interactions for red-emitting SrLa(Sc,Ga)O4:Ce3+ phosphor with improved thermal stability
Место публикации : Sci. China Mater. - 2023. - Vol. 66, Is. 5. - P.1989-1996. - ISSN 20958226 (ISSN), DOI 10.1007/s40843-022-2315-9. - ISSN 21994501 (eISSN)
Примечания : Cited References: 32. - This work was supported by the National Key Research and Development Program of China (2021YFE0105700), the National Natural Science Foundations of China (51972118), the Natural Science Foundation of Shandong Province (ZR2021ZD10 and ZR2018JL016), Guangzhou Science & Technology Project (202007020005), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work was also funded by Russian Foundation for Basic Research (19-52-80003)
Аннотация: Blue-light-excitable red-emitting phosphors with high thermal stability are essential for fabricating white light-emitting diodes (WLEDs). Herein, Ce3+-doped SrLaScO4 (SLO:Ce3+) phosphor is discovered to have an abnormal red emission band centered at 640 nm when excited at 440 nm. Spectroscopy and structural analyses confirm that Ce3+ ions occupy the [LaO8] polyhedrons competitively, generating a strong crystal field splitting and a large Stokes shift to produce a red emission. To further restrict the thermal quenching of SLO:Ce3+, charge-transfer engineering is implemented by incorporating a large electronegative Ga3+ in the Sc3+ site, which can attract more charges from nearby coordinating groups to decrease the electronic occupation at the bottom of the conduction band and thereby enlarge the band gap. Sc/Ga substitution in SrLa(Sc,Ga)O4:Ce3+ enhances the thermal stability by increasing the intensity ratio from 15% to 31% at 150°C compared with 20°C. This is attributed to the efficient suppression of the thermally stimulated ionization process. This study presents a general design principle for discovering novel Ce3+-doped red phosphors with good thermal stability for WLED applications.
Смотреть статью,
Читать в сети ИФ
Найти похожие

16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ming, Hong, Zhao, Yifei, Zhou, Yayun, Molokeev M. S., Wang, Yuanjing, Song, Enhai, Zhang, Qinyuan
Заглавие : Chemical group substitution enables highly efficient Mn4+ luminescence in heterovalent systems
Место публикации : Adv. Optical Mater. - 2023. - Vol. 11, Is. 10. - Ст.2300076. - ISSN 21951071 (eISSN), DOI 10.1002/adom.202300076
Примечания : Cited References: 36. - This work was financially supported by the National Key Research and Development Program of China (2022YFB3503800), the National Science Foundation of China (Grant Nos. 52202170 and 51972117). This work was also funded by RFBR according to the research project No. 19-52-80003
Аннотация: Defects are a double-edged sword for heterovalent metal-ion doping phosphors. Along with the luminescence tunability of phosphors bestowed by defects, their expected luminescence efficiency would also be inevitably lowered due to the presence of these quenching sites. Herein, a chemical group substitution strategy is proposed, where inorganic polyhedrons act as the smallest chemical units during the structural evolution of the doping process. Such a method can not only effectively prevent the defect generation for charge compensation in heterovalent doping systems, but also facilitate the incorporation of activators into the matrix, leading to extremely high luminescence efficiency. The concept is first confirmed energetically favorable by first-principles simulations. As a robust experimental proof, two newly reported Mn4+-incorporated hexavalent organic-inorganic hybrid oxyfluorides (TMA)2BO2F4:Mn4+ (where TMA stands for tetramethylammonium, and B = W6+ or Mo6+) present high quantum efficiency (up to 94.4%) and short lifetime (down to 2.26 ms) that are superior to the commercial red phosphor K2SiF6:Mn4+ (≈84.8%, ≈8.06 ms). Utilizing the differences in decay lifetimes and thermal quenching behaviors of (TMA)2BO2F4:Mn4+ and K2SiF6:Mn4+, a time- and temperature-resolved single-color multiplexing mode with high-safety and easy-access is developed for information security. This work offers an effective strategy to manipulate defect generation in luminescent materials.
Смотреть статью,
Читать в сети ИФ
Найти похожие

17.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Slyusarenko N. V., Krylov A. S., Timofeeva M. V., Shipilovskikh S. A., Slyusareva E. A.
Заглавие : Luminescent studies of flexible [DUT-8 (Zn)] metal-organic frameworks
Колич.характеристики :6 с
Коллективы : International Conference on Pulsed Lasers and Laser Applications
Место публикации : Proc. SPIE. - 2023. - Vol. 12920: XVI International Conference on Pulsed Lasers and Laser Applications (10-15 September 2023, Tomsk, Russian Federation). - Ст.1292014. - , DOI 10.1117/12.3005774
Примечания : Cited References: 10. - The reported study was funded by RFBR and DFG, project 21-52-12018
Аннотация: An approach to the study of the porous structure of metal-organic frameworks (MOF) using guest luminescent molecules with specially selected spectral characteristics as acceptors of electronic excitation energy was suggested. If such molecules are adsorbed in MOF pores with sizes comparable to the Förster radius, Förster resonance energy transfer (FRET) from photoexcited linkers occurs. In this case quenching of luminescence of the linker can serve as analytical signals indicating open pore structure of the MOF. The developed approach was demonstrated by the example of DUT-8(Zn) MOF and Coumarin 1 as guest molecules by time-resolved luminescence methods.
Смотреть статью,
Scopus
Найти похожие

18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yakimanskiy, Anton A., Kaskevich, Ksenia I., Chulkova, Tatiana G., Krasnopeeva, Elena L., Savilov, Serguei V., Voinova, Vera V., Neumolotov, Nikolay K., Zhdanov, Andrey P., Rogova, Anastasia V., Tomilin F. N., Zhizhin, Konstantin Yu., Yakimansky, Alexander V.
Заглавие : Effect of complexation with closo-decaborate anion on photophysical properties of copolyfluorenes containing dicyanophenanthrene units in the main chain
Колич.характеристики :11 с
Место публикации : Micro. - 2023. - Vol. 3, Is. 4. - P.930-940. - ISSN 26738023 (eISSN), DOI 10.3390/micro3040063
Примечания : Cited References: 23. - This work was supported by the Russian Science Foundation, grant no. 23-43-00060
Аннотация: The functionalization of copolyfluorenes containing dicyanophenanthrene units by closo-decaborate anion is described. Target copolyfluorenes were analyzed using SEM, UV-vis, luminescence, NMR, and Fourier-transform infrared (FTIR) spectroscopy. The effect of complexation with the closo-decaborate anion on the photophysical properties was studied both experimentally and theoretically. The PL data indicate an efficient charge transfer from fluorene to the dicyanophenanthrene units coordinated to the closo-decaborate. The coordination of closo-decaborate clusters to the nitrile groups of copolyfluorenes provides an important route to new materials for sensors and light-emitting devices while, at the same time, serving as a platform for further study of the nature of boron clusters.
Смотреть статью,
Scopus,
Читать в сети ИФ
Найти похожие

19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Li Y., Gai S., Zhu H., Yin J., Guo W., Molokeev M. S., Lu X., Xia M., Zhou Z.
Заглавие : Abnormal Bi3+ activated NIR phosphor toward multifunctional LED applications
Колич.характеристики :10 с
Место публикации : Ceram. Int. - 2023. - Vol. 49, Is. 23, Pt. B. - P.39671-39680. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2023.09.322. - ISSN 18733956 (eISSN)
Примечания : Cited References: 45. - This research was jointly supported by the National Natural Science Foundation of China (Grant No. 51974123 ), the Key R & D Projects in Hunan Province ( 2021SK2047 , 2022NK2044 ), the Natural Science Foundation of Hunan Province, China (Grant No. 2021JJ40261 ), Wangcheng Science and Technology Plan ( KJ221017 ), the Science and Technology Innovation Program of Hunan Province ( 2022WZ1022 ) and the Strategic Academic Leadership Program “Priority-2030” for the Siberian Federal University
Аннотация: Herein, the strategy of replacing Ge4+ with smaller Si4+ was adopted to realize the site-selective occupation of Bi3+ activator in the small ring and obtain a near-infrared light-emitting in Zn2(Ge,Si)O4. The designed phosphor exhibits a broad NIR emission with FWHM ≈104 nm in the 650−860 nm region, with a center emission wavelength of about 750 nm. Interestingly, the more sensitive four-member ring sites gradually replaced the six-member ring sites and realized a large-scope photoluminescence regulation from blue to NIR by just after the crystal field engineering. The possible reasons for this phenomenon can be interpreted by centroid shift (εc) and crystal field splitting (εcfs). This work not only provides new insights for the development of Bi3+-activated NIR-emitting phosphors, but also provides thoughts for revealing the potential NIR luminous mechanism of Bi3+.
Смотреть статью,
Scopus,
WOS
Найти похожие

20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yakimanskiy A. A., Kaskevich K. I., Zhukova E. V., Berezin I. A., Litvinova L. S., Chulkova T. G., Lypenko D. A., Dmitriev A. V., Pozin S. I., Nekrasova N. V., Tomilin F. N., Ivanova D. A., Yakimansky A. V.
Заглавие : Synthesis, photo- and electroluminescence of new polyfluorene copolymers containing dicyanostilbene and 9,10-dicyanophenanthrene in the main chain
Колич.характеристики :14 с
Место публикации : Materials. - 2023. - Vol. 16, Is. 16. - Ст.5592. - ISSN 19961944 (eISSN), DOI 10.3390/ma16165592
Примечания : Cited References: 25. - This work was supported by the Russian Science Foundation, grant no. 23-43-00060
Аннотация: Using palladium-catalyzed Suzuki polycondensation, we synthesized new light-emitting fluorene copolymers containing the dicyano derivatives of stilbene and phenanthrene and characterized them by gel permeation chromatography, UV-vis absorption spectroscopy, spectrofluorimetry, and cyclic voltammetry. The photoluminescence spectra of the synthesized polymers show significant energy transfer from the fluorene segments to the dicyanostilbene and 9,10-dicyanophenanthrene units, which is in agreement with the data of theoretical calculations. OLEDs based on these polymers were fabricated with an ITO/PEDOT-PSS (35 nm)/p-TPD (30 nm)/PVK (5 nm)/light emitting layer (70–75 nm)/PF-PO (20 nm)/LiF (1 nm)/Al (80 nm) configuration. Examination of their electroluminescence revealed that copolymers of fluorene with dicyanostilbene show yellow-green luminescence, while polymers with 9,10-dicyanophenanthrene have a greenish-blue emission. The 9,10-dicyanophenanthrene units have a more rigid structure compared to dicyanostilbene and, in OLEDs based on them, an increase in maximum brightness is observed with an increase in the content of the additive to the polymer chain. In particular, the device using fluorene copolymer with 9,10-dicyanophenanthrene (2.5 mol%) exhibited a maximum brightness of 9230 cd/m2 and a maximum current efficiency of 3.33 cd/A.
Смотреть статью,
Scopus,
WOS
Найти похожие