Enhanced luminescence performance of CaO: Ce3+, L-i+, F- phosphor and its phosphor-inglass based high-power warm LED properties : сборник научных трудов | Научно-инновационный портал СФУ

Enhanced luminescence performance of CaO: Ce3+, L-i+, F- phosphor and its phosphor-inglass based high-power warm LED properties : сборник научных трудов

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1039/c8tc00813b

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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Издание

Журнал: JOURNAL OF MATERIALS CHEMISTRY C

Выпуск журнала: Vol. 6, Is. 15

Номера страниц: 4077-4086

ISSN журнала: 20507526

Место издания: CAMBRIDGE

Издатель: ROYAL SOC CHEMISTRY

Авторы

  • Deng Jiankun (South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China)
  • Zhang Haoran (South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China)
  • Zhang Xuejie (South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China)
  • Molokeev Maxim S. (RAS, SB, Fed Res Ctr KSC, Lab Crystal Phys,Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Qiu Jianbei (Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China)
  • Liu Yingliang (South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China)
  • Lei Bingfu (South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China)
  • Ma Li (Georgia Southern Univ, Dept Phys, Statesboro, GA 30460 USA)
  • Wang Xiaojun (Georgia Southern Univ, Dept Phys, Statesboro, GA 30460 USA)

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