Effect of Ce3+ on the Luminescence Properties of SrAl2O4:Eu2+, Dy3+ Persistent Phosphors for Alternating Current Driven Light-Emitting Diodes

SrAl 2 O 4 :Eu 2+ , Dy 3+ has been widely studied as a classical persistent phosphor due to its stability and long green-afterglow duration. In this study, a series of Ce 3+ co-doped SrAl 2 O 4 :Eu 2+ , Dy 3+ phosphors were prepared by the traditional solid state reaction method, sintering under Ar...

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Published in:Russian journal of inorganic chemistry 2022, Vol.67 (9), p.1442-1450
Main Authors: Qian Zhang, Xiong, Yifei, Shi, Qiufeng, Shi, Yun, Niu, Mingjun, Liu, Wentao, Wu, Tong, Wang, Ling, Zhou, Zhenzhen, Liu, Qian, Fang, Jinghong, He, Huan, Ni, Jinqi, Wang, Chaoyue, Yu, Jiangding, Wang, Haibo, Shichalin, O., Belov, A. A., Papynov, E. K., Ivanets, A. I., Zou, Jun
Format: Article
Language:English
Subjects:
Absorption cross sections
Afterglows
Alternating current
Cerium
Chemistry
Chemistry and Materials Science
Crystallization
Doping
Dysprosium
Europium
Inorganic Chemistry
Inorganic Materials and Nanomaterials
Light emitting diodes
Luminescence
Optical properties
Phosphors
Sintering
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Summary:SrAl 2 O 4 :Eu 2+ , Dy 3+ has been widely studied as a classical persistent phosphor due to its stability and long green-afterglow duration. In this study, a series of Ce 3+ co-doped SrAl 2 O 4 :Eu 2+ , Dy 3+ phosphors were prepared by the traditional solid state reaction method, sintering under Ar + 5% H 2 atmosphere in the temperature range of 1300–1500°C. The effect of Ce 3+ co-doping on luminescence performance of SrAl 2 O 4 :Eu 2+ , Dy 3+ was investigated at Ce 3+ concentration of 0–0.3 at %. Under excitation wavelengths of 365, 400 and 460 nm, respectively, the luminescence intensity was found to increase linearly with rise of sintering temperature or Ce 3+ doping concentrations. It was ascribed to the sufficient crystallization at high sintering temperature as well as the high absorption cross section of Ce 3+ ion. Besides, the Ce 3+ co-doping speeds up the afterglow time without introducing the emission wavelength shift. Therefore, Ce 3+ co-doped SrAl 2 O 4 : Eu, Dy is a promising high efficient phosphor for compensated the dark period in alternating current driven light-emitting diodes (AC-LED) lighting.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023622090212