Peng Yang, Wang Sinmin, Li Ruixin, Li Hong, Cheng Hao, Chen Mingxiang, Liu Sheng
Appl Opt. 2016 Jun 20;55(18):4933-8. doi: 10.1364/AO.55.004933.
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.
为提高紫外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）玻璃中磷光体（PiG）的新型封装结构。通过丝网印刷和低温烧结制备了RGB PiG，并研究了RGB磷光体层不同配置顺序对WLED光学性能的影响。与传统的混合RGB PiG相比，在500 mA驱动电流下，采用R-G-B顺序的多层PiG封装的WLED的发光效率提高了8.2%，相应的相关色温（CCT）和显色指数（CRI）分别为2984 K和86.8。此外，采用多层G-R-B PiG封装的WLED以牺牲颜色质量为代价，产生了最高的发光效率27.19 lm/W，其仍然是可接受的暖光，CCT为3326 K，CRI为84.2。
