Tetracyano-substituted spiro[fluorene-9,9′-xanthene] as electron acceptor for exciplex thermally activated delayed fluorescence

被引：10
|
作者：
Cao, Hong-Tao [1 ,2 ]
Hong, Chao-Shen [1 ,2 ]
Ye, Dan-Qing [1 ,2 ]
Liu, Li-Hui [1 ,2 ]
Xie, Ling-Hai [1 ,2 ]
Chen, Shu-Fen [1 ,2 ]
Sun, Chen [1 ,2 ,4 ]
Wang, Sha-Sha [1 ,2 ]
Zhang, Hong-Mei [1 ,2 ]
Huang, Wei [1 ,2 ,3 ]
机构：
[1] NUPT, CMSOD, CMSOD Key Lab Organ Elect & Informat Displays, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China
[2] NUPT, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, IAM, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China
[3] NPU, SIFE, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China
[4] IMDEA Nanociencia, Madrid Inst Adv Studies Nanosci, Calle Faraday 9,Ciudad Univ, Canto Blanco 28049, Spain
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2019年 / 1196卷
关键词：
Spiro[fluorene-9,9 '-xanthene; Tetracyano-substitution; Electron acceptor; Thermally activated delayed fluorescence; Exciplex; Organic light-emitting diode; LIGHT-EMITTING-DIODES; IRIDIUM(III) COMPLEXES; HIGH-EFFICIENCY; EMITTERS; BLUE; MECHANISM; LIGANDS; DESIGN; OLEDS; FILMS;
D O I：
10.1016/j.molstruc.2019.06.003
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Herein, a tetracyano-substituted spiro[fluorene-9,9'-xanthene] (SFX) derivative, 2,3',6',7-tetracarbonitrile-SFX (TCNSFX) was conveniently synthesized as electron acceptor for combining with tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as electron donor to form exciplex emitter. Subsequently, exciplex-TADF was successfully realized with photoluminescence quantum yield of 29% and electroluminescence efficiency of 6.0 cd A(-1) in TCTA:TCNSFX. The exciplex-TADF performance of TCTA:TCNSFX is related to the stronger electron-accepting ability through tetracyano-substitution and large driving force in the exciplex emission. Although the emission efficiencies are slightly low, this work enriches the design system of electron acceptors for exciplex-TADF, simultaneously offering an efficient and convenient approach to developing low-cost materials and devices for TADF. (C) 2019 Published by Elsevier B.V.
引用
收藏
页码：132 / 138
页数：7
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