文献类型：期刊文献

英文题名：Luminescence performance and thermoluminescence of a new long afterglow phosphor Na2Ca2-xCexSc2Si3O12 for AC-LED applications

作者：Zheng, Weicheng[1];Yu, Junwen[1];Zhu, Fangyin[1];Wang, Chunyu[1];Chen, Meiling[1];Luo, Fangyan[1];Xiong, Zhengye[1];Guo, Jingyuan[1]

机构：[1]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：51

期号：30

起止页码：63793

外文期刊名：CERAMICS INTERNATIONAL

收录：SCI-EXPANDED(收录号：WOS:001642077200001)、、EI(收录号：20254919656985)、Scopus(收录号：2-s2.0-105023852677)、WOS

基金：Doctoral Start-up Fund Project (Grant No. 060302112102) ; Zhanjiang Science and Technology Program Project (Grant No. 2022A05022) ; and Key Areas Special Project for Higher Education Institutions in Guangdong Province (Grant No. 2024ZDZX4062) are appreciated because of their financial support. The authors extend their gratitude to Mr./Ms. Cao from Scientific Compass (www.shiyanjia.com ) for providing invaluable assistance with the PL analysis.

语种：英文

外文关键词：Luminescence; Long afterglow phosphor; AC-LED; Ce3+; Luminescence; Long afterglow phosphor; AC-LED

外文摘要：With the wide adoption of blue-light chips, the demand for blue-light-excited long afterglow phosphors is increasing, and the current long afterglow phosphors excited by blue light exhibit relatively low afterglow brightness. In this study, a novel long afterglow phosphor, Na2Ca2-xCexSc2Si3O12 (0.0025 <= x <= 0.08) phosphor, was prepared by a high-temperature solid-state method, and it was found that the increase in Ce3+ concentration led to the enhancement of crystal field splitting as well as the substitution of Ca2+ by Ce3+, which in turn led to the spectral redshift. In addition, as the temperature rises, the emission intensity value of this phosphor at 450 K decreases to 69.39 % of that at 300 K with an activation energy Delta E-q = 0.3445 eV/K. Therefore, this phosphor material has a better thermal stability, which makes it more suitable for AC-LED lighting applications. Finally, analysis of the thermoluminescence curves by first-order kinetic fitting and the initial rise method yielded a trap depth of Na2Ca2-0.02Ce0.02Sc2Si3O12 is about 0.73 eV for the temperature of 300 K-380 K. The afterglow mechanism makes the flickering rate of Na2Ca2-0.02Ce0.02Sc2Si3O12 AC-LED reduced by 67.67 %, indicating that the phosphor material has strong potential for AC-LED applications.