摘要
讨论了基于水溶性感光胶的荧光粉的涂层技术,利用粉浆法,在蓝光LED芯片的表面获得了荧光粉平面涂层。证实了得到的白光LED的光提取效率与粉浆中各成份的浓度和相应的比例有关,并在实验的基础上,采用了一些切实切可行的措施来增加器件的光提取效率。得到的白光LED在700 mA加速老化168 h后,其光能量为初始时的95.95%。
Slurry method based on a phosphor suspension in a water-soluble photoresist was discussed. A conforreal-coating phosphor layer was deposited on the surface of LEDs. The luminous performance of power white LEDs was found to be mainly depending on the concentration and ratio of ingredients in slurry and the structure of coating layer. In this paper, the parameters were investigated and some advices, which were suggested to improve the perfonnance, were proven to be effective in our experiment. The aging testing of LEDs with this slurry method showed that the luminous flux was 95.95% of that of the beginning after the LED was lightened for 168 h at 700 mA.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2009年第1期19-24,共6页
Chinese Journal of Luminescence
基金
Project supported by the National High Technology Research and Development Program(863)of China(2006AA03A116)
Application-based Research of Sichuan Province (2008JY0051)~~
关键词
白光LEDs
粉浆
提取效率
封装
white LEDs
slurry
extraction efficiency
packaging
