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Organic single-crystal light-emitting transistors with external quantum efficiency over 20%

查看全文 作　　者：Jian [1]Deng;Zejian [1]Zhang;Pengpeng [2]Sang;Shujun [1]Yin;Shitong [3]Zhang;Yuan [2]Li;Bing [3]Yang;Cheng [1,4]Gu;Yuguang [1,4]Ma 高影响力作者 机构地区：[1]State Key Laboratory of Luminescent Materials and Devices,Institute of Polymer Optoelectronic Materials and Devices,South China University of Technology,Guangzhou,P.R.China;[2]School of Information Science and Engineering,Shandong University,Qingdao,P.R.China;[3]State Key Laboratory of Supramolecular Structure and Materials,Institute of Theoretical Chemistry,College of Chemistry,Jilin University,Changchun,P.R.China;[4]Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,South China University of Technology,Guangzhou,P.R.China高影响力机构 出　　处：《Aggregate》索引2023年第4卷第4期,共6页高影响力期刊 基　　金：National Key R&D Program of China,Grant/Award Number:2020YFA0714604;Natural Science Foundation of China,Grant/Award Numbers:21975078,91833304,21973081,51521002,51703065,62174100;Guangdong Basic and Applied Basic Research Foundation,Grant/Award Numbers:2019B030302007,2021A1515010311;Natural Science Foundation of Guangdong Province,Grant/Award Numbers:2019B030301003,2019B121205002;Introduced Innovative R&D Team of Guangdong,Grant/Award Number:201101C0105067115;Research and Development Funds for Science and Technology Program of Guangzhou,Grant/Award Number:202007020004;Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,Grant/Award Number:2019B030301003。 摘　　要：Organic light-emitting transistors(OLETs)have attracted increasing attention because of their potential applications in next-generation displays and high-energy operating devices.However,the simultaneous achievement of high luminescent efficiency and carrier mobility in organic semiconductors remains challenging because the localized excitons are advantageous for light emission,whereas the delocalized carriers are beneficial for efficient charge migration.Herein,we report an organic single crystal of a cyano-substituted styrene derivative with balanced mobility yielding a record-high external quantum efficiency of 20.5%in OLETs.Temperature-dependent I–V curves and electronic structure analyses based on firstprinciples calculations were performed to disclose the underlying mechanism as a band transport,which provides an efficient way to achieve high quantum efficiency in OLETs. 关 键 词：organic electronics organic light-emitting transistors single crystals STYRENE
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