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

• Published in: Russian journal of inorganic chemistry Vol. 67; no. 9; pp. 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: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2022; Springer Nature B.V
• 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; Eu; afterglow; AC-LED; persistent phosphor; Ce; Dy; doping; SrAl; O
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023622090212

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.