Cho Sang-Hwan, Oh Jeong Rok, Park Hoo Keun, Kim Hyoung Kun, Lee Yong-Hee, Lee Jae-Gab, Do Young Rag
Department of Physics, KAIST, Daejeon, Korea.
Opt Express. 2010 Jan 18;18(2):1099-104. doi: 10.1364/OE.18.001099.
We demonstrate the combined effects of a microcavity structure and light-recycling filters (LRFs) on the forward electrical efficiency of phosphor-converted white organic light-emitting diodes (pc-WOLEDs). The introduction of a single pair of low- and high-index layers (SiO(2)/TiO(2)) improves the blue emission from blue OLED and the insertion of blue-passing and yellow-reflecting LRFs enhances the forward yellow emission from the YAG:Ce(3+) phosphors layers. The enhancement of the luminous efficacy of the forward white emission is 1.92 times that of a conventional pc-WOLED with color coordinates of (0.34, 0.34) and a correlated color temperature of about 4800 K.
我们展示了微腔结构和光回收滤光片（LRF）对磷光转换型白色有机发光二极管（pc-WOLED）正向电效率的综合影响。引入一对低折射率和高折射率层（SiO₂/TiO₂）可改善蓝色OLED的蓝光发射，而插入蓝光通过和黄光反射的LRF可增强YAG:Ce³⁺磷光体层的正向黄光发射。正向白色发射的发光效率提高到了传统pc-WOLED的1.92倍，其色坐标为(0.34, 0.34)，相关色温约为4800 K。
