含硼受体的高效热活化延迟荧光材料:外量子效率高达32.6％的天蓝色有机发光二极管

Optimization of boron-containing acceptors towards high-efficiency TADF emitters:sky-blue OLEDs with external quantum efficiency of 32.6％

巩旭 ¹杨威 ²张贺 ¹宁为民 ¹龚少龙 ¹高翔 ³杨楚罗⁴

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作者信息

1. Department of Chemistry,Renmin Hospital of Wuhan University,Hubei Key Lab on Organic and Polymeric Optoelectronic Materials,Wuhan University,Wuhan 430072,China
2. Shenzhen Key Laboratory of New Information Display and Storage Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China
3. Department of Pharmacy,Renmin Hospital of Wuhan University,Wuhan 430060,China
4. Department of Chemistry,Renmin Hospital of Wuhan University,Hubei Key Lab on Organic and Polymeric Optoelectronic Materials,Wuhan University,Wuhan 430072,China;Shenzhen Key Laboratory of New Information Display and Storage Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China
折叠

摘要

两个新热活化延迟荧光(TADF)分子BOBT和BPBT,分别通过连接BTDMAC给体(D)和三芳基硼或氧桥环化硼受体(A)构建而成.BPBT的光致发光量子产率(PLQY)为84％,与之相比,BOBT由于硼氧骨架的多重共振效应而具有更高的PLQY,高达100％.D-A分子的结构特征,使得含硼的BOBT分子具有约106 s-1的快速反系间窜越速率.以BOBT制备的天蓝光有机发光二极管(OLED)实现了高达32.6％的最大外量子效率.

Abstract

Two new thermally activated delayed fluores-cence(TADF)molecules,13-(2,12-di-tert-butyl-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracen-7-yl)-5,5-dimethyl-5,13-di-hydrobenzo[4,5]thieno[3,2-c]acridine(BOBT)and 13-(4-(di-mesitylboranyl)-3,5-dimethylphenyl)-5,5-dimethyl-5,13-dihy-drobenzo[4,5]thieno[3,2-c]acridine(BPBT),are constructed via connecting the 5,5-dimethyl-5,13-dihydrobenzo[4,5]thie-no[3,2-c]acridine(BTDMAC)donor(D)with triarylboron or oxygen-bridged cyclized boron acceptors(A),respectively.In comparison with the photoluminescence quantum yield(PLQY)of 84％for BPBT,BOBT shows a higher PLQY of 100％,due to the multi-resonance effect of the boron-oxygen skeleton.In addition,the D-A-type molecular structural characteristic endows the boron-containing BOBT emitter with a fast reverse intersystem crossing rate on the order of 106 s-1.The sky-blue organic light-emitting diode(OLED)employing the BOBT emitter achieves state-of-the-art device performances with a high external quantum efficiency of 32.6％.

关键词

organic light-emitting diodes/thermally activated delayed fluorescence/boron-containing acceptor

Key words

organic light-emitting diodes/thermally activated delayed fluorescence/boron-containing acceptor

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出版年

2024

中国科学:材料科学(英文)

CSTPCD

ISSN：

段落导航