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    Crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors / P. L. Shi [et al.] // Dalton Trans. - 2014. - Vol. 43, Is. 25. - P. 9669-9676, DOI 10.1039/C4DT00339J. - Cited References: 46. - The present work was supported by the National Natural Science Foundations of China (grant no. 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 Fundamental Research Funds for the Central Universities (2-9-2014-044), and the Funds of the State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (KF201306). V. V. A. gratefully acknowledges the Ministry of Education and Science of the Russian Federation for the financial support. . - ISSN 1477-9226. - ISSN 1477-9234
   Перевод заглавия: Кристаллохимия и люминесцентные свойства твердых растворов люминофоров CsGd1-xEux(MoO4)2, излучающих красный свет

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
WHITE-LIGHT
   VIBRATIONAL PROPERTIES
   HYDROTHERMAL SYNTHESIS
   SINGLE-CRYSTALS
   DIODES
   EFFICIENCY
   PHOTOLUMINESCENCE
   CSGD(MOO4)2
   MORPHOLOGY
   GROWTH
Аннотация: Scheelite related alkali-metal rare-earth double molybdate compounds with a general formula of ALn(MoO4)2 can find wide application as red phosphors. The crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors have been evaluated in the present paper. A detailed analysis of the structural properties indicates the formation of isostructural scheelite-type CsGd1−xEux(MoO4)2 solid-solutions over the composition range of 0 ≤ x ≤ 1. The photoluminescence emission (PL) and excitation (PLE) spectra, and the decay curves were measured for this series of compounds. The critical doping concentration of Eu3+ is determined to be x = 0.6 in order to realize the maximum emission intensity. The emission spectra of the as-obtained CsGd(1−x)Eux(MoO4)2 phosphors show narrow high intensity red lines at 592 and 615 nm upon excitation at 394 or 465 nm, revealing great potential for applications in white light-emitting diode devices.

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Держатели документа:
China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
RAS, Kirensky Inst Phys, Lab Crystal Phys, SB, Krasnoyarsk 660036, Russia
RAS, Kirensky Inst Phys, Lab Opt Mat & Struct, SB, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielectr Mat, Novosibirsk 630090, Russia

Доп.точки доступа:
Shi, P. L.; Xia, Zhiguo; Molokeev, M. S.; Молокеев, Максим Сергеевич; Atuchin, V. V.
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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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