Highly efficient phosphorescent organic light-emitting diodes using a homoleptic iridium(III) complex as a sky-blue dopant |
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| Authors: | Jinyong Zhuang Wanfei Li Wenming Su Yuan Liu Qi Shen Liangsheng Liao Ming Zhou |
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| Affiliation: | 1. Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Soochow University, Suzhou, Jiangsu 215123, PR China;2. Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, 398 Ruoshui Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China;3. Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, PR China;4. SunaTech Inc., Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China |
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| Abstract: | Homoleptic triscyclometalated iridium(III) complex Ir(dbi)3 was used as a dopant for sky blue phosphorescent organic light-emitting diodes (PHOLEDs). Its photophysical, thermal, electrochemical properties as well as the device performances were investigated. Ir(dbi)3 exhibited high quantum yield of 0.52 in solution at room temperature. A maximum current efficiency and external quantum efficiency (EQE) of 61.5 cd A−1 and 23.1% were obtained, which are the highest ever reported for blue homoleptic iridium complexes. High efficiencies of 53.5 cd A−1 and 20.1% EQE were achieved even at the luminance of 1000 cd m−2. |
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| Keywords: | Phosphorescent OLED Homoleptic Iridium(III) complex Sky-blue Highly efficient |
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