Department of Physics
Realization of ultra-high color stable hybrid white organic light-emitting diodes via sequential symmetrical doping in emissive layersz
High performance three-color hybrid white organic light-emitting diode (WOLED) has been demonstrated by emissions from a fluorescent blue emitter 5,11-di(40-dimesitylboronphenyl) indolo[3,2-b]carbazole (DDBICZ), a phosphorescent yellow emitter bis(2-(3-trifluoromethyl-4-fluorophenyl)-4-methylquinolyl) (acetylacetonate)iridium(III) (Ir(ffpmq)2(acac)) and a phosphorescent red emitter bis(1-phenylisoquinoline) (acetylacetonate)iridium(III) (Ir(piq)2(acac)). The blue emitting DDBICZ in the device also acts as a host for Ir(ffpmq)2(acac) and Ir(piq)2(acac) dopants. The emissive layer in the DDBICZ-based hybrid WOLEDs consists of a sequential symmetric doping configuration for achieving high color stability, CIE color coordinates of (0.40, 0.41) and color rendering index of 86 over the brightness range from 10 cd/m2 to 10,000 cd/m2. The hybrid WOLEDs thus developed also possess a high lumious efficiency of 25.9 cd/A.
Science of Advanced Materials
American Scientific Publishers
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COLOR RENDERING INDEX, COLOR STABILITY, HYBRID WOLED, WOLED
Miao, Yanqin, Zhixiang Gao, Peng Tao, Heping Shi, Hua Wang, Yuanhao Li, Husheng Jia, Wing Hong Choi, and Fu Rong Zhu. "Realization of ultra-high color stable hybrid white organic light-emitting diodes via sequential symmetrical doping in emissive layersz." Science of Advanced Materials 8.2 (2016): 401-407.