首页 | 本学科首页   官方微博 | 高级检索  
     


Temperature effects on photoluminescence of YAG:Ce3+ phosphor and performance in white light-emitting diodes
Authors:ZHANG Yanfang  LI Lan  ZHANG Xiaosong  XI Qun
Abstract:The well crystalline YAG:Ce3 phosphor was synthesized by solid-state method, and the temperature dependence of excitation and emission spectra of YAG:Ce3 phosphor were investigated in the temperature range from room temperature to 573 K. With temperature increasing, it was noted that the emission intensity of as-prepared phosphors decreased considerably more rapidly when pumped by 460 nm than by 340 nm. The temperature-intensity curves under different excitation wavelengths were obtained using an Arrhenius function, and the corresponding activation energies were also obtained respectively. Thus, the experimental phenomenon was discussed in terms of nonradiative decay rate. The effects of as-prepared phosphors on the performance of the white LED with changing temperature were also studied.
Keywords:white light-emitting diodes  YAG: Ce3   activation energy  nonradiative decay rate  rare earths
本文献已被 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号