A new spiro[fluorene-9,9′-xanthene]-based host material possessing no conventional hole- and electron-transporting units for efficient and low voltage blue PHOLED via simple two-step synthesis |
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| Authors: | Yan Qian Guohua Xie Shufen Chen Zhengdong Liu Yeren Ni Xinhui Zhou Linghai Xie Jing Liang Yuezhi Zhao Minghong Yi Yi Zhao Wei Wei Wei Huang |
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| Affiliation: | 1. Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210046, China;2. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China |
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| Abstract: | A new spiro[fluorene-9,9′-xanthene]-based host material SFX-PF without possessing conventional hole- and electron-transporting units has been developed, via very simple two-step synthesis, for efficient and low voltage blue phosphorescent organic light-emitting device (PHOLED). The blue device exhibited a low turn-on voltage of 2.8 V, and high maximum current efficiency, power efficiency, and external quantum efficiency up to 29.3 cd/A, 28.9 lm/W, and 14.7%, respectively. At the luminance level of 1000 cd/m2, the driving voltages are still lower than 4.0 V with 12.9% roll-off of the external quantum efficiency. Based on our previous studies, these investigations provide the clues that SFX could be a new building block for designing blue phosphorescent host materials. |
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| Keywords: | Organic light-emitting diodes Host material Spiro[fluorene-9,9&prime -xanthene] |
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