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Synthesis and luminescence properties of Li2O–Y2O3–TeO2:Eu3+ tellurite glass / V. V. Atuchin [et al.] // Mater. Chem. Phys. - 2014. - Vol. 147, Is. 3. - P. 1191-1194, DOI 10.1016/j.matchemphys.2014.07.003. - Cited References: 26. - This study is partly supported by the Ministry of Education and Science of the Russian Federation. . - ISSN 0254-0584. - ISSN 1879-3312

РУБ Materials Science, Multidisciplinary
Рубрики:
LIGHT-EMITTING-DIODES
   SPECTROSCOPIC PROPERTIES
   OPTICAL-PROPERTIES
   ENERGY-TRANSFER
   CERAMICS
   Eu3+
   PHOTOLUMINESCENCE
   TEMPERATURE
   EMISSION
   PHOSPHOR
Кл.слова (ненормированные):
Glasses -- Heat treatment -- Photoluminescence spectroscopy -- Optical properties
Аннотация: The Eu3+-doped red-orange emitting phosphor of tellurite glass 0.25Li2O–0.20Y2O3–0.5TeO2–0.05Eu2O3 has been synthesized by the melt quenching method. The amorphous nature of the glass has been verified by XRD measurements. The photoluminescence excitation and emission spectra, the luminescence decay curves have been investigated for the composition. The phosphor can be efficiently excited by the near UV light to realize the intense narrow red emission line (611 nm) corresponding to forced electric dipole transition 5D0 → 7F2 of Eu3+ ions. The Li2O–Y2O3–TeO2:Eu3+glass phosphor is a potential red-orange emitting candidate for the application in WLEDs.

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SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia
SB RAS, Inst Geol & Mineral, Lab High Pressure Minerals & Diamond Deposits, Novosibirsk 630090, Russia
Novosibirsk State Univ, Dept Appl Phys, Novosibirsk 630090, Russia
SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Atuchin, V. V.; Yelisseyev, A. P.; Galashov, E. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Ministry of Education and Science of the Russian Federation
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    Synthesis, crystal structure, and enhanced luminescence of garnet-type Ca3Ga2Ge3O12:Cr3+ by codoping Bi3+ / C. Y. Liu [et al.] // J. Am. Ceram. Soc. - 2015. - Vol. 98, Is. 6. - P. 1870-1876, DOI 10.1111/jace.13553. - Cited References:24. - This work was supported by the National Natural Science Foundations of China (grant nos. 51002146, 51272242), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), Beijing Youth Excellent Talent Program (YETP0635), the Funds of the State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (KF201306) and Fundamental Research Funds for the Central Universities (FRF-TP-14-005A1). . - ISSN 0002. - ISSN 1551-2916
   Перевод заглавия: Синтез, кристаллическая структура и улучшенная люминесценция граната Ca3Ga2Ge3O12:Cr3+ содопированного Bi3+

РУБ Materials Science, Ceramics
Рубрики:
LIGHT-EMITTING-DIODES
   INFRARED PERSISTENT LUMINESCENCE
   ENERGY-TRANSFER
   PHOSPHOR
   RED
   NANOPARTICLES
   EFFICIENCY
Аннотация: Garnet-type compound Ca3Ga2Ge3O12 and Cr3+-doped or Cr3+/Bi3+ codped Ca3Ga2Ge3O12 phosphors were prepared by a solid-state reaction. The crystal structure of Ca3Ga2Ge3O12 host was studied by X-ray diffraction (XRD) analysis and further determined by the Rietveld refinement. Near-infrared (NIR) photoluminescence (PL) and long-lasting phosphorescence (LLP) emission can be observed from the Cr3+-doped Ca3Ga2Ge3O12 sample, and the enhanced NIR PL emission intensity and LLP decay time can be realized in Cr3+/Bi3+ codped samples. The optimum concentration of Cr3+ in Ca3Ga2Ge3O12 phosphor was about 6 mol%, and optimum Bi3+ concentration induced the energy-transfer (ET) process between Bi3+ and Cr3+ ions was about 30 mol%. Under different excitation wavelength from 280 to 453 nm, all the samples exhibit a broadband emission peaking at 739 nm and the intensity of NIR emission increases owing to the ET behavior from Bi3+ to Cr3+ ions. The critical ET distance has been calculated by the concentration-quenching method. The thermally stable luminescence properties were also studied and the introduction of Bi3+ can also improve the thermal stability of the NIR emission.

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Держатели документа:
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China.
China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China.
SB RAS, LV Kirensky Phys Inst, Lab Crystal Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Liu, Chengyin; Xia, Zhiguo; Molokeev, M. S.; Молокеев, Максим Сергеевич; Liu, Quanlin
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    Engineering oxygen vacancies towards self-activated BaLuAlxZn4-xO7-(1-x)/2 photoluminescent materials: An experimental and theoretical analysis / L. Ma [et al.] // Phys. Chem. Chem. Phys. - 2015. - Vol. 17, Is. 46. - P. 31188-31194, DOI 10.1039/c5cp05130d. - Cited References: 28. - The present work was supported by the National Natural Science Foundations of China (Grant No. 51572023, 51272242 and 51511130035), and Fundamental Research Funds for the Central Universities (FRF-TP-15-005A1). The author A. H. Reshak would like to acknowledge the CENTEM project, reg. no. CZ.1.05/2.1.00/03.0088, cofunded by the ERDF as part of the Ministry of Education, Youth and Sports OP RDI programme and, in the follow-up sustainability stage, supported through CENTEM PLUS (LO1402) by financial means from the Ministry of Education, Youth and Sports under the National Sustainability Programme I. Computational resources were provided by MetaCentrum (LM2010005) and CERIT-SC (CZ.1.05/3.2.00/08.0144) infrastructures. SA would like to thank CSIR-NPL and Physics Department IIT Delhi for financial support. This work was partly supported by the Russian Foundation for Basic Research (Grant No. 15-52-53080 GFEN_a). VVA was partly supported by the Ministry of Education and Science of the Russian Federation. . - ISSN 1463-9076
   Перевод заглавия: Разработка кислородных вакансий для самоактивируемых люминесцентных материалов BaLuAlxZn4-xO7-(1-x)/2: экспериментальный и теоретический анализ

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
PHOSPHOR
   LUMINESCENCE
   EVOLUTION
   OXIDES
   IONS
Аннотация: Novel self-activated yellow-emitting BaLuAlxZn4-xO7-(1-x)/2 photoluminescent materials were investigated by a combined experimental and theoretical analysis. The effects of Al/Zn composition modulation, calcination atmosphere and temperature on the crystal structure and photoluminescence properties have been studied via engineering oxygen vacancies. Accordingly, BaLuAl0.91Zn3.09O7 prepared in an air atmosphere was found to be the stable crystalline phase with optimal oxygen content and gave a broad yellow emission band with a maximum at 528 nm. The self-activated luminescence mechanism is ascribed to the O-vacancies based on the density functional theory (DFT) calculation. A theoretical model originating from the designed oxygen vacancies has been proposed in order to determine the influence of O-vacancies on the band structure and self-activated luminescence. Therefore, the appearance of a new local energy level in the band gap will cause the wide-band optical transitions in the studied BaLuAlxZn4-xO7-(1-x)/2 materials.

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Держатели документа:
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Council of Scientific and Industrial Research-National Physical Laboratory Dr K S Krishnan Marg, New Delhi, India
Department of Physics, Indian Institute of Technology, Hauz Khas, New Delhi, India
New Technologies-Research Centre, University of West Bohemia, Univerzitni 8, Pilsen, Czech Republic
Center of Excellence Geopolymer and Green Technology, School of Material Engineering, University Malaysia Perlis, Kangar, Perlis, Malaysia

Доп.точки доступа:
Ma, L.; Xia, Z.; Atuchin, V. V.; Атучин, Виктор Валерьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Auluck, S.; Reshak, A. H.; Liu, Q.
}
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    Glass-ceramics with thermally stable blue-red emission for high-power horticultural LED applications / W. B. Chen, X. J. Zhang, J. X. Zhou [et al.] // J. Mater. Chem. C. - 2020. - Vol. 8, Is. 12. - P. 3996-4002, DOI 10.1039/d0tc00061b. - Cited References: 36. - The present work was supported by the National Natural Science Foundations of China (Grant No. 21671070); the Project of GDUPS (2018) for Prof. Bingfu LEI; the Guangzhou Science & Technology Project, China (No. 201704030086); and the National Undergraduate Innovation and Entrepreneurship Training Program grant for Gening Xie (No. 201910564035). . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Стеклокерамика с термостойким сине-красным излучением для мощных светодиодов применимых для выращивания агрокультур

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
PLANT-GROWTH
   ENERGY-TRANSFER
   CARBON DOTS
   PHOSPHOR
   LIGHT
Аннотация: As one of the key elements of indoor agriculture, horticultural light sources are developing rapidly towards requiring high energy density, high output power and high stability, which poses a challenge for traditional phosphor conversion devices. To address this, an all-inorganic blue-red dual-emitting light convertor consisting of Ba1.3Sr1.7MgSi2O8:Eu2+,Mn2+ (BSMS) phosphor-in-glass (PiG) plates was prepared to improve the duration lifetime of converted high-power light-emitting diodes (LEDs) and meet the light quality requirements of photosynthesis for indoor agriculture. The obtained samples show an external quantum efficiency of 45.3%, outstanding thermal stability and a specific emission spectrum that highly matches the absorption of chlorophyll and β-carotene. Moreover, a proof-of-concept BSMS-PiG horticultural lamp for application in an indoor plant factory was successfully fabricated based on a ∼370 nm emitting LED chip. The blue-red ratio of its spectrum could be regulated by controlling the thickness of BSMS-PiG and the concentrations of Mn2+ ions within BSMS-PiG. The BSMS-PiG horticultural LEDs were applied to the indoor cultivation of Romaine lettuce. The results indicated that the biomass of Romaine lettuce was 58.21% greater than that of control lettuce samples cultivated under commercial plant lamps. In particular, the content values of total chlorophyll, β-carotene and soluble protein were improved. The BSMS-PiG horticultural LED is a potential candidate to act as a high-power horticultural light source.

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Держатели документа:
South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Peoples R China.
Minist Educ, Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China.
Minist Educ, Key Lab Modern Agr Mat, Guangzhou 510642, Peoples R China.
South China Univ Technol, Sch Mat Sci & Engn, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Peoples R China.
South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Peoples R China.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Chen, Weibin; Zhang, Xuejie; Zhou, Jianxian; Zhang, Haoran; Zhuang, Jianle; Xia, Zhiguo; Liu, Yingliang; Molokeev, M. S.; Молокеев, Максим Сергеевич; Xie, Gening; Lei, Bingfu
}
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    Two-site Cr3+ occupation in the MgTa2O6:Cr3+ phosphor toward broad-band near-infrared emission for vessel visualization / G. C. Liu, M. S. Molokeev, B. F. Lei, Z. G. Xia // J. Mater. Chem. C. - 2020. - Vol. 8, Is. 27. - P. 9322-9328, DOI 10.1039/d0tc01951h. - Cited References: 52. - The present work was supported by the National Natural Science Foundations of China (Grant No. 51972118, 51961145101 and 51722202), Fundamental Research Funds for the Central Universities (D2190980), the Guangzhou Science & Technology Project (202007020005), the Guangdong Provincial Science & Technology Project (No. 2018A050506004), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X137). This work is also funded by RFBR according to the research project No. 19-52-80003. . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Заселение Cr3+ двух кристаллографических позиций в люминофоре MgTa2O6:Cr3+ для широкополосного ближнего инфракрасного излучения используемого для визуализации сосудов

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
LIGHT-SOURCES
   PHOSPHOR
   LUMINESCENCE
   PHOTOLUMINESCENCE
Аннотация: Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) have great potential in photonic, optoelectronic and biological applications, while the discovery of a broad-band NIR phosphor still remains a challenge. Here, we report a novel Cr3+-activated MgTa2O6 phosphor with an asymmetrical emission band ranging from 700 to 1150 nm and a large full width at half maximum (FWHM) of 140 nm upon 460 nm blue light excitation. The broad spectrum is assigned to the overlap of two bands centered at 910 and 834 nm, which originate from the spin-allowed transition of 4T2 → 4A2 for different Cr3+ ions located in the two six-coordinated crystallographic sites of Mg2+ and Ta5+, respectively. The distribution of blood vessels and bones in human palm and wrist is observed with the assistance of a commercial NIR camera and a fabricated pc-LED, which demonstrates that the MgTa2O6:Cr3+ phosphor is promising in biological applications.

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Держатели документа:
South China Univ Technol, Sch Mat Sci & Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510640, 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.
South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Peoples R China.

Доп.точки доступа:
Liu, Gaochao; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lei, Bingfu; Xia, Zhiguo
}
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    Thermometry and up-conversion luminescence of Ln3+ (Ln = Er, Ho, Tm)-doped double molybdate LiYbMo2O8 / X. Y. Yun, J. Zhou, Y. H. Zhu [et al.] // J. Mater. Sci.: Mater. Electron. - 2020. - Vol. 31, Is. 21. - P. 18370-18380, DOI 10.1007/s10854-020-04382-8. - Cited References: 41. - This work is supported by the National Natural Science Foundation of China (No. 21576002 and 61705003) and Beijing Technology and Business University Research Team Construction Project (No. PXM2019_014213_000007) . - ISSN 0957-4522. - ISSN 1573-482X
   Перевод заглавия: Термометрия и апконверсионная люминесценции двойного молибдата LiYbMo2O8, легированного Ln (3+) (Ln = Er, Ho, Tm)

РУБ Engineering, Electrical & Electronic + Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
TEMPERATURE SENSING BEHAVIOR
   OPTICAL THERMOMETRY
   EMISSION
   PHOSPHOR
Аннотация: The discovery of stable and highly sensitive up-conversion (UC) phosphors using the fluorescence intensity ratio (FIR) is a significant challenge in the field of optical temperature sensor. Er3+/Ho3+/Tm3+-doped LiYbMo2O8 UC phosphors with excellent luminescence properties were successfully synthesized through a high-temperature solid-state reaction, and the crystal structure and UC luminescence properties were discussed in detail. The UC process has been investigated by spectra pump power dependence and further explained via the energy level diagram. All emission processes about Er3+ ions and Ho3+ ions are two-photon processes and the blue emission process about Tm3+ ions is a combination of two-photon process and three-photon process. Thermal sensing performances depended on FIR technology were estimated and the sensitivities of LiYb1−xMo2O8:xLn3+ included absolute sensitivity (Sa) and relative sensitivity (Sr) can produce particular change rules with the temperature, which can serve as excellent candidates for applications in optical temperature sensing. With the increase of temperature, the maximum values of Sr of LiYb1−xMo2O8:xLn3+ are 1.16% K−1 (0.05Er3+), 0.25% K−1 (0.01Ho3+), and 0.51% K−1 (0.01Tm3+), respectively. In addition, the Sa value of LiYb0.95Mo2O8:0.05Er3+ phosphor will reach the maximum (1.08% K−1) at 475 K, while the maximum values of Sa of LiYb0.99Mo2O8:0.01Ho3+ and LiYb0.99Mo2O8:0.01Tm3+ are 0.16% K−1, 0.14% K−1.

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Держатели документа:
Beijing Technol & Business Univ, Sch Sci, Beijing 100048, Peoples R China.
RAS, Fed Res Ctr, Kirensky Inst Phys, Lab Crystal Phys,KSC,SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Yun, Xiangyan; Zhou, Jun; Zhu, Yaohui; Molokeev, M. S.; Молокеев, Максим Сергеевич; Jia, Yetong; Wei, Chao; Xu, Denghui; Sun, Jiayue
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    Enhanced cyan emission and optical tuning of Ca3Ga4O9:Bi3+ for high-quality full-spectrum white light-emitting diodes / D. J. Liu, X. H. Yun, G. G. Li [et al.] // Adv. Opt. Mater. - 2020. - Vol. 8, Is. 22. - Ст. 2001037, DOI 10.1002/adom.202001037. - Cited References: 55. - This work was financially supported by the National Natural Science Foundation of China (NSFC No. 51932009, 51720105015, 51672265, 51672266, 51672257 and 51672259), the Key Research Program of Frontier Sciences, CAS (Grant No. YZDY-SSW-JSC018), Science and Technology Cooperation Project between Chinese and Australian Governments (2017YFE0132300), the Jiangmen Innovative Research Team Program (2017), and the Major Program of Basic Research and Applied Research of Guangdong Province (2017KZDXM083) . - ISSN 2195-1071
   Перевод заглавия: Улучшенное голубое излучение и оптическая настройка Ca3Ga4O9:Bi3+ для получения высококачественных белых светодиодов полного спектра

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
ENERGY-TRANSFER
   TUNABLE LUMINESCENCE
   PHOSPHOR
   CRYSTAL
   MODULATION
Кл.слова (ненормированные):
cyan-emitting phosphors -- full-spectrum white lighting -- optical tuning -- single-phased white light-emitting diodes
Аннотация: Highly efficient cyan‐emitting phosphor materials are indispensable for closing the cyan gap in spectra of the traditional phosphor‐converted white light‐emitting diodes (WLEDs) to achieve high‐quality full‐spectrum white lighting. In this work, bright cyan‐emitting Ca3Ga4O9 (CGO):0.02Bi3+,0.07Zn2+ phosphor is developed to bridge the cyan gap. Such a Bi3+,Zn2+ codoping enhances the cyan emission of CGO:0.02Bi3+ by 4.1 times due to the influence of morphology and size of phosphor particles, charge compensation and lattice distortion. Interestingly, codoping La3+ ions into the current system can achieve a photoluminescence tuning of CGO:0.02Bi3+ from cyan to yellowish‐green by crystallographic site engineering. Besides, Bi3+–Eu3+ energy transfer is successfully realized in CGO:0.02Bi3+,0.07Zn2+,nEu3+ phosphors and the emission color tuning from cyan to orange is observed. The investigation of thermal quenching behaviors reveals that the incorporation of Zn2+ and La3+ improves the thermal stability of CGO:0.02Bi3+. Finally, CGO:0.02Bi3+,0.07Zn2+,0.10Eu3+ phosphor is employed to obtain a single‐phased warm WLED device. A full‐spectrum WLED device with remarkable color rendering index (Ra) of 97.4 and high luminous efficiency of 69.72 lm W−1 is generated by utilizing CGO:0.02Bi3+,0.07Zn2+ phosphor. This result suggests the important effect of CGO:0.02Bi3+,0.07Zn2+ phosphor on closing the cyan gap, providing new insights of cyan‐emitting phosphors applied in full‐spectrum white lighting.

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Держатели документа:
Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China.
Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China.
China Univ Geosci, Fac Mat Sci & Chem, Engn Res Ctr Nanogeomat, Minist Educ, Wuhan 430074, Peoples R China.
RAS, SB, Lab Crystal Phys, Kirensky Inst Phys,Fed Res Ctr,KSC, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk 660041, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Shandong Univ, Sch Mat Sci & Engn, Jinan 266071, Peoples R China.
Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Guangdong, Peoples R China.

Доп.точки доступа:
Liu, Dongjie; Yun, Xiaohan; Li, Guogang; Dang, Peipei; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lian, Hongzhou; Shang, Mengmeng; Lin, Jun
}
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    Liu, Gaochao.
    Structural rigidity control toward Cr3+-based broadband near-infrared luminescence with enhanced thermal stability / G. C. Liu, M. S. Molokeev, Z. G. Xia // Chem. Mat. - 2022. - Vol. 34, Is. 3. - P. 1376-1384, DOI 10.1021/acs.chemmater.1c04131. - Cited References: 59. - This work was supported by the International Cooperation Project of the National Key Research and Development Program of China (2021YFE0105700) , National Natural Science Foundation of China (Nos.: 51972118 and 51961145101) , 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 RFBR according to the research Project No. 19-52-80003 . - ISSN 0897-4756. - ISSN 1520-5002
   Перевод заглавия: Контроль структурной жесткости для получения широкополосной люминесценции в ближней инфракрасной области на основе Cr3+ с повышенной термической стабильностью

РУБ Chemistry, Physical + Materials Science, Multidisciplinary
Рубрики:
PHOSPHOR
   PHOTOLUMINESCENCE
   EFFICIENT
   EMISSION
   CR3+
Аннотация: Broadband near-infrared (NIR) light sources based on phosphor-converted light-emitting diodes (pc-LEDs) are desirable for biochemical analysis and medical diagnosis applications; however, the development of target NIR phosphor is still a challenge. Herein, broadband NIR phosphors, Cr3+-activated CaSc1–xAl1+xSiO6 (λem = 950 nm), are designed and optimized by chemical substitution toward enhanced quantum efficiency and thermal stability. Structural and spectral analyses along with density functional theory calculations reveal that Sc3+/Al3+ substitution contributes to enhancing the structural rigidity and the local symmetry of the [Sc/AlO6] octahedron so that the nonradiative relaxation of Cr3+ emission centers is suppressed significantly. The as-fabricated phosphor-in-glass-based NIR LED light source demonstrates great potential in the detection of alcohol concentration. This study provides a local structure design principle for exploring NIR phosphors with enhanced thermal stability and will also stimulate further studies on material discovery and quantitative analysis of NIR spectroscopy.

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Держатели документа:
South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, 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.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510641, Peoples R China.

Доп.точки доступа:
Molokeev, M. S.; Молокеев, Максим Сергеевич; Xia, Zhiguo; International Cooperation Project of the National Key Research and Development Program of China [2021YFE0105700]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51972118, 51961145101]; Guangzhou Science & Technology Project [202007020005]; Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X137]; RFBRRussian Foundation for Basic Research (RFBR) [19-52-80003]
}
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