Low energy consumption phosphorescent organic light-emitting diodes using phenyl anthracenone derivatives as the host featuring bipolar and thermally activated delayed fluorescence |
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| Authors: | Zhonghua Ye Zhitian Ling Minyu Chen Jiali Yang Shuanglong Wang Yanqiong Zheng Bin Wei Chong Li Guo Chen Ying Shi |
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| Affiliation: | School of Materials Science and Engineering, Shanghai University, Shanghai 200072 P. R. China.; Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai 200072 P. R. China.; Nanjing University of Technology, No. 30 South Puzhu Road, Pukou District, Nanjing 211816 P. R. China |
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| Abstract: | A novel host material featuring the characteristics of bipolarity and thermally activated delayed fluorescence, 10-(4-(5,5-dimethylbenzofuro[3,2-c]acridin-13(5H)-yl)phenyl)-10-phenylanthracen-9(10H)-one (DphAn-5BzAc), has been designed and synthesized. By employing this material as the host of green emitter Ir(ppy)2acac, we have fabricated phosphorescent organic light-emitting diodes (PhOLEDs) with two hosting schemes, which are the single host system consisting of DhAn-5BzAc and the co-host system with 1,3-bis(carbazolyl)benzene (mCP). We found that the co-host based PhOLED achieved very low energy consumption values at high brightnesses, which were only 0.5, 5.9 and 94.0 mW m−2 at 100, 1000 and 10 000 cd m−2, respectively. The extremely low energy consumption for DhAn-based PhOLEDs were attributed to the excellent bipolar transport properties and thermally activated delayed fluorescence characteristics.A bipolar host material 10-(4-(5,5-dimethylbenzofuro[3,2-c]acridin-13(5H)-yl)phenyl)-10-phenylanthracen-9(10H)-one (DphAn-5BzAc) with TADF properties, has been synthesized. |
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