Low energy consumption phosphorescent organic light-emitting diodes using phenyl anthracenone derivatives as the host featuring bipolar and thermally activated delayed fluorescence

Zhonghua Ye; Zhitian Ling; Minyu Chen; Jiali Yang; Shuanglong Wang; Yanqiong Zheng; Bin Wei; Chong Li; Guo Chen; Ying Shi

doi:10.1039/C8RA10658D

Low energy consumption phosphorescent organic light-emitting diodes using phenyl anthracenone derivatives as the host featuring bipolar and thermally activated delayed fluorescence†

Zhonghua Ye,

‡^a Zhitian Ling,‡^a Minyu Chen,^b Jiali Yang,^b Shuanglong Wang,^b Yanqiong Zheng,^b Bin Wei,

^b Chong Li,^c Guo Chen*^b and Ying Shi*^a

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* Corresponding authors

^a School of Materials Science and Engineering, Shanghai University, Shanghai 200072, P. R. China
E-mail: yshi@shu.edu.cn

^b Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, P. R. China
E-mail: chenguo@shu.edu.cn

^c Nanjing University of Technology, No. 30 South Puzhu Road, Pukou District, Nanjing 211816, P. R. China

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.

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Low energy consumption phosphorescent organic light-emitting diodes using phenyl anthracenone derivatives as the host featuring bipolar and thermally activated delayed fluorescence†

Abstract

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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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