Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass
Luminous efficacy enhancement of ultraviolet-excited white light-emitting diodes through multilayered phosphor-in-glass
复制标题
通过多层玻璃荧光粉增强紫外激发白光发光二极管的发光效率
DOI：
10.1364/ao.55.004933
复制
发表时间：
2016-06-20
期刊：
影响因子：
1.9
通讯作者：
Liu, Sheng
中科院分区：
文献类型：
--
作者：
Peng, Yang;Wang, Sinmin;Liu, Sheng
为了提高紫外光激发白光发光二极管(WLED)的发光效率，提出了一种基于多层红绿蓝(RGB)玻璃荧光粉(PIG)的新型封装结构。采用丝网印刷和低温烧结的方法制备了RGB PIG，研究了RGB荧光层的不同结构顺序对WLED光学性能的影响。与传统的混合RGB PIG相比，在500 mA的驱动电流下，R-G-B级多层PIG封装的WLED发光效率提高了8.2%，相应的相关色温(CCT)和显色指数(CRI)分别为2984K和86.8。此外，由多层G-R-B PIG封装的WLED产生的最高发光效率为27.19 lm/W，但牺牲了颜色质量，这仍然是一种可接受的暖光，CCT为3326K，CRI为84.2。(C)2016年度美国光学学会
To enhance the luminous efficacy of ultraviolet-excited white light-emitting diodes (WLEDs), a novel packaging structure that is based on a multilayered red, green, and blue (RGB) phosphor-in-glass (PiG) was proposed. The RGB PiG was prepared by screenprinting and low temperature sintering, and the effects of different configuration orders of RGB phosphor layers on the optical performance of WLEDs were studied. Compared with the conventional mixed-RGB PiG, the luminous efficacy of WLEDs packaged by the multilayered PiG with the order of R-G-B is increased by 8.2% at the driving current of 500 mA, and the corresponding correlated color temperature (CCT) and color rendering index (CRI) are 2984 K and 86.8, respectively. Moreover, the WLEDs packaged by multilayered G-R-B PiG yield the highest luminous efficacy of 27.19 lm/W at the expense of color quality, which is still an acceptable warm light, with a CCT of 3326 K and a CRI of 84.2. (C) 2016 Optical Society of America