应用化学 ›› 2025, Vol. 42 ›› Issue (5): 701-711.DOI: 10.19894/j.issn.1000-0518.240411

• 研究论文 • 上一篇    下一篇

SrS∶Eu2+和SrAl2O4∶Eu2+,Dy3+长余辉发光粉封装发光二极管的光效

楚献智1,2, 庞然2, 韩松林2, 姜丽宏2, 李慧敏2, 李晓东1(), 张粟2(), 张洪杰2   

  1. 1.吉林建筑大学材料科学与工程学院,长春 130118
    2.中国科学院长春应用化学研究所,稀土资源利用国家重点实验室,长春 130022
  • 收稿日期:2024-12-16 接受日期:2025-04-18 出版日期:2025-05-01 发布日期:2025-06-05
  • 通讯作者: 李晓东,张粟
  • 基金资助:
    国家重点研发项目(2019YFA0709100)

Luminous Efficacy of Light Emitting Diode with SrS∶Eu2+ and SrAl2O4∶Eu2+,Dy3+ Long Afterglow Phosphors

Xian-Zhi CHU1,2, Ran PANG2, Song-Lin HAN2, Li-Hong JIANG2, Hui-Min LI2, Xiao-Dong LI1(), Su ZHANG2(), Hong-Jie ZHANG2   

  1. 1.School of Materials Science and Engineering,Jilin Architecture University,Changchun 130118,China
    2.State Key Laboratory of Application of Rare Earth Resources,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2024-12-16 Accepted:2025-04-18 Published:2025-05-01 Online:2025-06-05
  • Contact: Xiao-Dong LI,Su ZHANG
  • About author:zhangsu@ciac.ac.cn
    lxdjlju@163.com
  • Supported by:
    the National Key R&D Program of China(2019YFA0709100)

摘要:

发光二极管(LED)光源目前已经成为照明系统最主要的光源。 为应对交流市电驱动产生的LED器件频闪,利用余辉材料弥补交流频闪成为研究的重点。 然而,余辉材料封装LED的光电性能仍缺乏系统研究。 采用高温固相法合成出SrS∶Eu2+和SrAl2O4∶Eu2+,Dy3+ 2种余辉粉,均能被蓝光高效激发产生621 nm红光发射和518 nm绿光发射。 使用450 nm蓝色LED芯片与这2种余辉粉进行封装,通过调节2种余辉粉和封装胶的比例可以获得光效达到130 lm/W及显色指数大于85的LED器件。 该类器件可满足日常白光照明的应用要求。 展现了长余辉荧光粉在LED照明领域的应用前景。

关键词: 余辉荧光粉, 发光二极管, 光效, 显色指数

Abstract:

Light-emitting diode (LED) sources have become the primary choice for modern lighting systems. To address the flicker issue caused by alternating current (AC) power supplies in LED devices, the use of afterglow materials to mitigate flickering has emerged as a key area of research. However, the optoelectronic performance of LED devices encapsulated with afterglow materials has yet to be systematically investigated. In this study, SrS∶Eu2? and SrAl?O?∶Eu2?,Dy3? afterglow phosphors were synthesized via a high-temperature solid-state reaction, both of which can be efficiently excited by blue light, yielding red emission at 621 nm and green emission at 518 nm, respectively. By encapsulating these phosphors with a 450 nm blue LED chip, and fine-tuning the phosphor-to-encapsulation resin ratio, LED devices with luminous efficacy reaching 130 lm/W and a color rendering index exceeding 85 were achieved. These devices meet the requirements for general white-light illumination, underscoring the promising application prospects of long-afterglow phosphors in LED lighting technology.

Key words: Afterglow phosphors, Light-emitting diode, Luminous efficacy, Color rendering index

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