A novel luminophor and host polymer from fluorene-carbazole derivatives for preparing solution-processed non-doped blue and closed-white light devices |
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| Authors: | Jing Sun Tiaomei Zhang Xiaoqing Liao Kexiang Wang Minna Hou Dongyu Wu Yanqin Miao Hua Wang Bingshe Xu |
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| Institution: | 1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan, 030024, PR China;2. Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan, 030024, PR China;3. Co-innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing, 402160, PR China |
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| Abstract: | A novel blue light emitting polymer was designed and synthesized via alternative conjugated 9,9-dioctylfluorene and 9-(6-(9H-carbazol-9-yl)hexyl)-9H-carbazole, named PF2Cz. It exhibited high thermal stability, good film morphology and strong deep-blue emission peaks at 408 and 429?nm in film. The triplet energy level of PF2Cz (ET?=?2.30?eV) was also improved. Non-doped and doped devices were both prepared by solution process to characterize the electroluminescent (EL) properties of PF2Cz. In non-doped devices, PF2Cz acted as blue emitter which exhibited a Commission Internation de L'Eclairage (CIE) coordinate of (0.164, 0.102) and a external quantum efficiency (EQE) values of 1.28%. Moreover, the doped phosphorescent devices utilized PF2Cz as host material obtained a closed-white light emission with a content of 1?wt% dopant. All these results indicated that the fluorene-carbazole derivatives could be a promising molecular design strategy for the synthesis of blue light and host organic semiconductors. |
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| Keywords: | Fluorene-carbazole derivatives Blue luminophor Host materials Electroluminescent performance |
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