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    Understanding perceived color through gradual spectroscopic variations in electrochromism / S. Mishra [et al.] // Indian J. Phys. - 2019. - Vol. 93, Is. 7. - P. 927-933, DOI 10.1007/s12648-018-1353-7. - Cited References: 34. - Authors acknowledge financial support from the Department of Science and Technology (DST), Govt. of India. Authors are thankful to Dr. K. V. Adarsh (IISER Bhopal) for Raman measurements. Authors thank Prof. V.D. Vankar (IIT Delhi) for useful discussions. Authors (AC and DKP) are thankful to MHRD and CSIR (Govt. of India), respectively, for providing fellowships. Support received from DST under FIST scheme (grant number: SR/FST/PSI-225/2016) is also acknowledged. . - ISSN 0973-1458. - ISSN 0974-9845
   Перевод заглавия: Понимание воспринимаемого цвета через постепенные спектроскопические изменения в электрохромизме

РУБ Physics, Multidisciplinary
Рубрики:
3 REDOX FORMS
   TUNGSTEN-OXIDE
   RAMAN-SPECTRA
   VIOLOGEN
   SALTS
Кл.слова (ненормированные):
Viologen -- Raman spectroscopy -- Electrochromism -- UV-Vis
Аннотация: A bias-dependent in situ Raman scattering and UV–Vis absorption spectroscopic change has been correlated with the corresponding color change of an electrochromic device in an attempt to explain how to understand the relationship between actual perceived color and its absorption/transmittance spectra. For this, the bias across an electrochromic device was increased gradually, rather than abruptly turning ON and OFF, to see subtle variations in Raman and absorption spectra due to bias. Raman scattering establishes that viologen changes its oxidation state reversibly between two redox species (EV2+ to EV+•) as a result of bias-induced dynamic redox process. A gradual variation in Raman and absorption spectra, which shows maximum absorption corresponding to the yellow light, accompanies similar variation in color change of the device as visible by naked eye. These spectroscopic results are correlated with the perceived blue color, in the reflected light, by the eye to understand the actual reason behind this. Maximum absorption of yellow light by the device resulting in blue appearance has been explained using the concept of additive and subtractive primary colors.

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Держатели документа:
Indian Inst Technol Indore, Discipline Phys & MEMS, Mat Res Lab, Simrol 453552, India.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Univ Alberta, Natl Inst Nanotechnol, Edmonton, AB, Canada.

Доп.точки доступа:
Mishra, S.; Yogi, P.; Chaudhary, A.; Pathak, D. K.; Saxena, S. K.; Krylov, A. S.; Крылов, Александр Сергеевич; Sagdeo, P. R.; Kumar, R.; Department of Science and Technology (DST), Govt. of India; MHRD; CSIR (Govt. of India); DST under FIST scheme [SR/FST/PSI-225/2016]
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    Polyhedron Transformation toward Stable Narrow-Band Green Phosphors for Wide-Color-Gamut Liquid Crystal Display / H. Liao [et al.] // Adv. Funct. Mater. - 2019. - Vol. 29, Is. 30. - Ст. 1901988, DOI 10.1002/adfm.201901988. - Cited References: 34. - The present work was supported by the National Natural Science Foundations of China (Grant Nos. 51722202, 91622125, and 51572023), Natural Science Foundations of Beijing (2172036), Fundamental Research Funds for the Central Universities (FRF‐TP‐18‐002C1), and the Guangdong Provincial Science & Technology Project (No. 2018A050506004). . - ISSN 1616-301X
   Перевод заглавия: Через преобразование полиэдра к устойчивым узкополосным зеленым люминофорам для жидкокристаллического дисплея с широкой цветовой гаммой
Кл.слова (ненормированные):
light-emitting diodes -- phosphor -- photoluminescence
Аннотация: A robust and stable narrow-band green emitter is recognized as a key enabler for wide-color-gamut liquid crystal display (LCD) backlights. Herein, an emerging rare earth silicate phosphor, RbNa(Li3SiO4)2:Eu2+ (RN:Eu2+) with exceptional optical properties and excellent thermal stability, is reported. The resulting RN:Eu2+ phosphor presents a narrow green emission band centered at 523 nm with a full width at half maximum of 41 nm and excellent thermal stability (102%@425 K of the integrated emission intensity at 300 K). RN:Eu2+ also shows a high quantum efficiency, an improved chemical stability, and a reduced Stokes shift owing to the modified local environment, in which [NaO8] cubes replace [LiO4] squares in RbLi(Li3SiO4)2:Eu2+ via polyhedron transformation. White light-emitting diode (wLED) devices with a wide color gamut (113% National Television System Committee (NTSC)) and high luminous efficacy (111.08 lm W−1) are obtained by combining RN:Eu2+ as the green emitter, K2SiF6:Mn4+ as the red emitter, and blue-emitting InGaN chips. Using these wLEDs as backlights, a prototype 20.5 in. LCD screen is fabricated, demonstrating the bright future of stable RN:Eu2+ for wide-color-gamut LCD backlight application.

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Держатели документа:
The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation

Доп.точки доступа:
Liao, H.; Zhao, M.; Zhou, Y.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, Q.; Zhang, Q.; Xia, Z.
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    Aliovalent substitution toward reinforced structural rigidity in Ce3+-doped garnet phosphors featuring improved performance / T. Hu [et al.] // J. Mater. Chem. C. - 2019. - Vol. 7, Is. 46. - P. 14594-14600, DOI 10.1039/c9tc05354a. - Cited References: 38. - This work was supported by the National Natural Science Foundation of China (No. 51722202 and 51972118), the Guangdong Provincial Science & Technology Project (2018A050506004) and the Fundamental Research Funds for the Central Universities (D2190980). . - ISSN 2050-7534
   Перевод заглавия: Алиовалентное замещение с целью усиления структурной жесткости в люминофорных гранатах, легированных Ce3 + и имеющих улучшенные характеристики
Кл.слова (ненормированные):
Color -- Deterioration -- Efficiency -- Gallium alloys -- Garnets -- III-V semiconductors -- Indium alloys -- Photoluminescence -- Reinforcement -- Rigidity -- Semiconductor alloys -- Thermal Engineering -- Thermodynamic stability
Аннотация: Highly efficient phosphors with thermal stability and color-tunable emission are required for the fabrication of phosphor-converted white light-emitting diodes (pc-WLEDs). Currently developed engineering strategies are generally successful in photoluminescence tuning but, unfortunately, suffer severe deterioration in emission intensity/efficiency and/or thermal stability. Herein, an efficient aliovalent substitution strategy toward reinforced structural rigidity is proposed and demonstrated experimentally. By incorporating Be2+ ion into the garnet-type Lu2SrAl4SiO12:Ce3+ phosphor, the phosphor shows enhanced internal/external quantum efficiency, from 79.2%/26.7% to 84.5%/32.9%, photoluminescence tuning from green (peaking at ∼512 nm) to yellow (peaking at ∼552 nm), and zero thermal quenching, even up to 200 °C. The Be2+ substitution at the Al2/Si2 site enables stable and rigid local surroundings around the Ce3+ activator, which is responsible for the unprecedented performance. In addition, high-quality warm WLED devices with a luminous efficiency of 158.1 lm W-1, correlated color temperature of 3858 K and high color rendering index of 81.7, are obtained by combining Lu2SrAl4SiO12:Ce3+,Be2+ as the yellow emitter, CaAlSiN3:Eu2+ as the red emitter and a blue-emitting InGaN chip. These findings highlight a new strategy for performance optimization of LED phosphors by selecting rigid covalent compounds with further reinforced structural rigidity via aliovalent substitution.

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Держатели документа:
State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation

Доп.точки доступа:
Hu, T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.; Zhang, Q.
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    Шабанов, Александр Васильевич.
    Особенности усиления электромагнитного поля и увеличение плотности фотонных состояний в растительных фотонно-кристаллических структурах / А. В. Шабанов, М. А. Коршунов, Е. Р. Буханов // Комп. оптика. - 2019. - Т. 43, № 2. - С. 231-237 ; Comput. Opt., DOI 10.18287/2412-6179-2019-43-2-231-237. - Библиогр.: 29 . - ISSN 0134-2452. - ISSN 2412-6179
   Перевод заглавия: Features of the amplification of the electromagnetic field and the density of states of photonic crystal structures in plants

РУБ Optics
Рубрики:
BLUE IRIDESCENCE
   LIGHT
   COLOR
   PULSE
   BAND
Кл.слова (ненормированные):
фотонный кристалл -- дефектная мода -- фотонная запрещенная зона -- слоистые периодические структуры -- плотность фотонных состояний -- photonic crystal -- defect mode -- photonic band gap -- layered periodic structures -- density of states
Аннотация: Проведены расчёты с использованием метода трансфер матриц одномерных фотонных кристаллов с низким контрастом и разнопериодными асимметричными структурами. Такие структуры были найдены во многих растениях. При состыковке двух последовательно соединённых подрешёток с разными периодами отмечается увеличение амплитуды электромагнитного поля и плотности фотонных состояний внутри структуры и их изменение в зависимости от асимметрии толщин подрешёток.
Calculations were performed using the transfer matrix of one-dimensional photonic crystals with low contrast and asymmetric structures of different periods. Such structures have been found in many plants. When joining two successively connected sublattices with different periods, an increase is observed in the amplitude of the electromagnetic field and the density of photon states inside the structure, and their change depends on the asymmetry of the thickness of the sublattices.

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Держатели документа:
Институт физики им. Л.В. Киренского, ФИЦ КНЦ СО РАН, Красноярск, Россия
ФИЦ КНЦ СО РАН, Красноярск, Россия

Доп.точки доступа:
Коршунов, Михаил Анатольевич; Korshunov, M. A.; Буханов, Евгений Романович; Bukhanov E. R.; Shabanov, A. V.

}
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    Enhanced luminescence performance of CaO:Ce3+,Li+,F- phosphor and its phosphor-in-glass based high-power warm LED properties / J. Deng [et al.] // J. Mater. Chem. C. - 2018. - Vol. 6, Is. 15. - P. 4077-4086, DOI 10.1039/c8tc00813b. - Cited References: 44. - The present study was supported by the National Natural Science Foundation of China (Grant No. 21671070), the Project for Construction of High-level University in Guangdong Province, the Teamwork Projects funded by the Guangdong Natural Science Foundation (Grant No. S2013030012842), the Guangzhou Science & Technology Project (No. 201704030086) and the Open Project Fund from Key Laboratory of Advanced of Materials of Yunnan Province (No. 2018KF01). . - ISSN 2050-7534
   Перевод заглавия: Улучшенные характеристики люминесценции CaO: Ce3 +, Li +, F- люминофора и мощные тепловые свойства светодиодной лампы, созданной на его основе
Кл.слова (ненормированные):
Correlated color temperature -- Critical concentration -- Doping concentration -- Enhanced luminescence -- High color rendering index -- High power white LED -- High temperature solid-state reaction -- Thermal and chemical stabilities
Аннотация: To obtain white light-emitted diodes (wLEDs) with a low correlated color temperature (CCT) and a high color rendering index (CRI), red-emission is indispensable in their emission spectra. Herein, CaO:Ce3+,Li+,F- yellow phosphors with more red spectral component have been prepared via a high temperature solid-state reaction. As compared to the F- undoped samples, CaO:Ce3+,Li+,F- phosphor have lower critical doping concentration of Ce3+ and show stronger luminescence. At the critical concentration, a quantum efficiency of 66.4% and enhanced thermal and chemical stability were obtained in CaO:Ce3+,Li+,F-. Furthermore, a CaO:Ce3+,Li+,F--based phosphor-in-glass (PiG) using the red-emitting glass system with the composition of SiO2-Na2CO3-Al2O3-CaO:Eu3+ as the host material was constructed and used for high-power white LED applications. Such PiG samples with different phosphor doping concentrations can satisfy various light color demands and display higher reliability than the CaO:Ce3+,Li+,F- phosphor. An optimal PiG-based wLED exhibits color coordinates of (0.3769, 0.3386), a CCT of 3774 K, a CRI of 82.5 and a LE of 73.1 when the mass ratio of phosphor to glass matrix was 7:50 in PiG. Moreover, such PiG-based wLED also showed acceptable color stability under different drive currents. All the above results demonstrate that CaO:Ce3+,Li+,F- can be expected to be a potential alternative yellow phosphor for blue light excited PiG based warm wLEDs, particularly for high-power devices.

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Guangdong Provincial Engineering Technology Research Center for Optical Agricultural, College of Materials and Energy, South China Agricultural University, Guangzhou, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, China
Department of Physics, Georgia Southern University, Statesboro, GA, United States

Доп.точки доступа:
Deng, J.; Zhang, H.; Zhang, X.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Qiu, J.; Liu, Y.; Lei, B.; Ma, L.; Wang, X.
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    Learning from a mineral structure toward an ultra-narrow-band blue-emitting silicate phosphor RbNa3(Li3SiO4)4:Eu2+ / H. X. Liao [et al.] // Angew. Chem. - Int. Edit. - 2018. - Vol. 57, Is. 36. - P. 11728-11731, DOI 10.1002/anie.201807087. - Cited References: 22. - This work was supported by the National Natural Science Foundations of China (Grant Nos. 51722202, 91622125 and 51572023), and Natural Science Foundations of Beijing (2172036), and M.S.M. acknowledges support of the Russian Foundation for Basic Research (17-52-53031). . - ISSN 1433-7851. - ISSN 1521-3773
   Перевод заглавия: Обучение от минеральной структуры к ультраузкополосному синему силикатному люминофору RbNa3(Li3SiO4)4:Eu2+

РУБ Chemistry, Multidisciplinary
Рубрики:
RED PHOSPHORS
COLOR-GAMUT
LUMINESCENCE
Кл.слова (ненормированные):
luminescence -- minerals -- phosphors -- rigid structure -- silicates
Аннотация: Learning from natural mineral structures is an efficient way to develop potential host lattices for applications in phosphor converted (pc)LEDs. A narrow‐band blue‐emitting silicate phosphor, RbNa3(Li3SiO4)4:Eu2+ (RNLSO:Eu2+), was derived from the UCr4C4‐type mineral model. The broad excitation spectrum (320–440 nm) indicates this phosphor can be well matched with the near ultraviolet (n‐UV) LED chip. Owing to the UCr4C4‐type highly condensed and rigid framework, RNLSO:Eu2+ exhibits an extremely small Stokes shift and an unprecedented ultra‐narrow (full‐width at half‐maximum, FWHM=22.4 nm) blue emission band (λem=471 nm) as well as excellent thermal stability (96 %@150 °C of the initial integrated intensity at 25 °C). The color gamut of the as‐fabricated (pc)LEDs is 75 % NTSC for the application in liquid crystal displays from the prototype design of an n‐UV LED chip and the narrow‐band RNLSO:Eu2+ (blue), β‐SiAlON:Eu2+ (green), and K2SiF6:Mn4+ (red) components as RGB emitters.

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Держатели документа:
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China.
Fed Res Ctr KSC SB RAS, Lab Crystal Phys, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Liao, Hongxu; Zhao, Ming; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, Quanlin; Xia, Zhiguo
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    Emerging ultra-narrow-band cyan-emitting phosphor for white LEDs with enhanced color rendition / M. Zhao [et al.] // Light: Sci. Appl. - 2019. - Vol. 8. - Ст. 38, DOI 10.1038/s41377-019-0148-8. - Cited References: 31. - The present work was supported by the National Natural Science Foundations of China (Grant Nos. 51722202, 51572023 and 91622125), Natural Science Foundations of Beijing (2172036), Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and the Guangdong Provincial Science & Technology Project (No. 2018A050506004). M.S.M. is grateful for the support from the Russian Foundation for Basic Research (Grant No. 17-52-53031). . - ISSN 2047-7538
   Перевод заглавия: Появление люминофора с ультра-узкополосным голубым излучением для белых светодиодов с улучшенной цветопередачей

РУБ Optics
Рубрики:
LUMINESCENCE PROPERTIES
TEMPERATURE
ROUTE
Аннотация: Phosphor-converted white LEDs rely on combining a blue-emitting InGaN chip with yellow and red-emitting luminescent materials. The discovery of cyan-emitting (470–500 nm) phosphors is a challenge to compensate for the spectral gap and produce full-spectrum white light. Na0.5K0.5Li3SiO4:Eu2+ (NKLSO:Eu2+) phosphor was developed with impressive properties, providing cyan emission at 486 nm with a narrow full width at half maximum (FWHM) of only 20.7 nm, and good thermal stability with an integrated emission loss of only 7% at 150 °C. The ultra-narrow-band cyan emission results from the high-symmetry cation sites, leading to almost ideal cubic coordination for UCr4C4-type compounds. NKLSO:Eu2+ phosphor allows the valley between the blue and yellow emission peaks in the white LED device to be filled, and the color-rendering index can be enhanced from 86 to 95.2, suggesting great applications in full-spectrum white LEDs.

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Держатели документа:
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Guangdong, Peoples R China.
South China Univ Technol, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Guangdong, Peoples R China.

Доп.точки доступа:
Zhao, Ming; Liao, Hongxu; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhou, Yayun; Zhang, Qinyuan; Liu, Quanlin; Xia, Zhiguo
}
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    Ultra-broad-band-excitable Cu(I)-based organometallic halide with near-unity emission for light-emitting diode applications / J. Huang, B. Su, E. Song [et al.] // Chem. Mater. - 2021. - Vol. 33, Is. 12. - P. 4382-4389, DOI 10.1021/acs.chemmater.1c00085. - Cited References: 43. - This research was supported by the National Natural Science Foundation of China (Grant Nos. 51961145101 and 51972118), the Fundamental Research Funds for the Central Universities (D2190980), the Guangzhou Science and Technology Project (202007020005), International Cooperation Project of National Key Research and Development Program of China (2021YFE0105700), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). The reported study was also funded by RFBR according to research project no. 19-52-80003 . - ISSN 0897-4756
   Перевод заглавия: Металлоорганический галогенид на основе Cu (I) со сверхширокополосным возбуждением и излучением с квантовым выходом близким к единице для применения в светодиодах
Кл.слова (ненормированные):
Crown ethers -- Hybrid materials -- Light -- Luminescence -- Metal halide lamps -- Metal halides -- Organic light emitting diodes (OLED) -- Organometallics -- Sodium compounds -- Application prospect -- Excitation characteristics -- Green emission bands -- High color rendering index -- Luminescence mechanisms -- Luminescent material -- Photoluminescence quantum yields -- White light emitting diodes -- Copper compounds
Аннотация: Low-dimensional hybrid metal halides demonstrate broad-band emission and high photoluminescence quantum yield (PLQY) acting as excellent candidates for a new generation of luminescent materials in lighting fields. However, most luminescent metal halides can only be excited by ultraviolet radiation, and the discovery of high-efficient emitters with broad-band excitation characteristics, especially upon efficient blue light irradiation, is a challenge. Herein, a zero-dimensional (0D) Cu(I)-based organometallic halide (18-crown-6)2Na2(H2O)3Cu4I6 (CNCI) was prepared with a green emission band centered at 536 nm and a near-unity PLQY (91.8%) upon excitation of 450 nm. Importantly, the ultrabroad excitation band covering a 300-500 nm range was observed in CNCI, and the luminescence mechanism has been discussed in detail. A white light-emitting diode (WLED) was fabricated with high luminous efficiency of 156 lm/W and a high color rendering index of 89.6. This work provides guidance for designing high-performance luminescent metal halides with suitable excitation characteristics and also promotes the application prospects of such materials in WLED fields.

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Держатели документа:
The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation

Доп.точки доступа:
Huang, J.; Su, B.; Song, E.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Z.
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Two-color display based on polymer dispersed liquid crystals films / V. A. Gunyakov, V. A. Zhuikov, V. Ya. Zyryanov [et al.] // First Summer European Liquid Crystal Conference : abstracts. - Vilnius, 1991. - Vol. 1. - P. 90

Доп.точки доступа:
Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Zhuikov, V. A.; Жуйков, Владимир Александрович; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Smorgon, S. L.; Сморгон, Сергей Леонидович; Shabanov, V. F.; Шабанов, Василий Филиппович; Summer European Liquid Crystals conference(1 ; 1991 ; Aug. 19-25 ; Vilnius)
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10.

    Apatite oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+: A single-phased host with solar-like and efficient emission / Y. Wu, W. Li, Y. Zheng [et al.] // J. Am. Ceram. Soc. - 2023. - Vol. 106, Is. 5. - P. 2985-2996, DOI 10.1111/jace.18981. - Cited References: 35. - This work was supported by the National Natural Science Foundation of China (Project No. 10804099, 21804119), Key projects of Zhejiang Natural Science Foundation (Project No. LZ18B050002), GDAS’ Project of Science and Technology Development (Nos. 2021GDASYL-20210103069, 2021GDASYL-20210103071) . - ISSN 0002-7820. - ISSN 1551-2916
   Перевод заглавия: Люминофор на основе оксинитрида апатита (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+: однофазная матрица с эффективным излучением почти солнечного спектра
Кл.слова (ненормированные):
apatite oxynitride -- color rendering index -- full-color-emitting phosphor -- quantum efficiency -- thermal stability
Аннотация: During pursuing high color rendering index for full-color-emitting phosphor, low quantum efficiency (QE) is usually accompanying. We intend to elevate the luminescence efficiency when realizing a solar-like spectra distribution, by constructing apatite structure oxynitride, inheriting high covalence and rigidity from oxynitride, and suitable multiple cation sites from oxyapatite compounds. Full-color-emitting apatite structure oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ has been prepared, and the crystal sites’ occupancies of activators in this host were favorable for white emission. (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ phosphor shows whole visible light with emission wavelength ranging from 370 to 750 nm, matching the spectra of sunlight quite well. The fabricated white light-emitting diode lamp demonstrated the distinctive overall performance of QE and chromaticity properties (Ra and R9). Furthermore, correlated color temperature is tunable from cool nature to warm white. The obtained lamp possesses the feature of less blue light hazard and high saturation of red degree, compared with the commercial YAG-based lamp.

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Держатели документа:
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou, China
Institute of Semiconductors, Guangdong Academy of Sciences, Guangzhou, China
School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Wu, Yanzheng; Li, Weiqiang; Zheng, Yifan; Xu, Yiqin; Wen, Dawei; Molokeev, M. S.; Молокеев, Максим Сергеевич; Pan, Zaifa
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