Induction of Strong Long-Lived Room-Temperature Phosphorescence of N-Phenyl-2-naphthylamine Molecules by Confinement in a Crystalline Dibromobiphenyl Matrix

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• 作者：Jinbei Wei ; Baoyan Liang ; Ruihong Duan ; Zong Cheng ; Chenglong Li ; Dr. Tianlei Zhou ; Prof. Dr. Yuanping Yi and Prof. Dr. Yue Wang
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：December 12, 2016
• 年：2016
• 卷：128
• 期：50
• 页码：15818-15822
• 全文大小：2112K
• ISSN：1521-3757

文摘

The design and preparation of metal-free organic materials that exhibit room-temperature phosphorescence (RTP) is a very attractive topic owing to potential applications in organic optoelectronic devices. Herein, we present a facile approach to efficient and long-lived organic RTP involving the doping of N-phenylnaphthalen-2-amine (PNA) or its derivatives into a crystalline 4,4′-dibromobiphenyl (DBBP) matrix. The resulting materials showed strong and persistent RTP emission with a quantum efficiency of approximately 20 % and a lifetime of a few to more than 100 milliseconds. Bright white dual emission containing blue fluorescence and yellowish-green RTP from the PNA-doped DBBP crystals was also confirmed by Commission Internationale de l'Eclairage (CIE) coordinates of (x=0.29–0.31, y=0.38–0.41).