Deep Ultraviolet Phototransistor Based on Thiophene-Fluorobenzene Oligomer with High Mobility and Performance  

作　　者：Yongxu Hu Zhongwu Wang Yinan Huang Rui Shi Shuguang Wang Xiaosong Chen Jinshun Bi Yundong Xuan Yong Lei Liqiang Li Chuluo Yang Wenping Hu 

机构地区：[1]Shenzhen Key Laboratory of New Information Display and Storage Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen,Guangdong,518060 China [2]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,Guangdong,518060 China [3]Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,Institute of Molecular Aggregation Science,Tianjin University,Tianjin,300072 China [4]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou,Fujian,350207 China [5]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin,300192 China [6]Institute of Microelectronics,Chinese Academy of Sciences,Beijing,100029 China [7]University of Chinese Academy of Sciences,Beijing,101408 China [8]Fachgebiet Angewandte Nanophysik,Institut für Physik&IMN MacroNano,Technische Universität Ilmenau,98693 Ilmenau,Germany

出　　处：《Chinese Journal of Chemistry》2023年第13期1539-1544,共6页中国化学（英文版）

基　　金：grateful to the National Key Research and Development Program(2018YFA0703200,2016YFB0401100,2016YFA0200803,2022YFE0124200);National Natural Science Foundation of China(52225304,52073210,21573277,52121002,52203236,51633006,U2241221);Tianjin Natural Science Foundation(19JCZDJC37400,19JCJQJC62600,20JCQNJC01520,20JCQNJC01990);the Shenzhen Science,Technology Program(ZDSYS20210623091813040);We thank the Haihe Laboratory of Sustainable Chemical Transformations for financial support.

摘　　要：Deep ultraviolet(UV)photodetectors have important applications in the industrial and military fields.However,little research has been reported on organic phototransistors(OPTs)in the deep ultraviolet range.Here,a novel organic semiconductor containing a small torsion angle and lowπ-conjugation 2,2':5',2"-terthiophene groups,oF-PTTTP,is designed and synthesized,which exhibits high carrier mobility and unique deep ultraviolet response.Accordingly,an OPT based on oF-PTTTP single crystal shows high responsivity to deep-UV light.The photodetectors achieve high photoresponsivity(R)of 857 A/W and detectivity(D*)of 3.2×10^(15)Jones under 280 nm light illumination(only 95 nW·cm^(–2)).To the best of our knowledge,280 nm is the deepest detection wavelength reported for organic phototransistors and this work presents a new molecule design concept for organic phototransistors with deep-UV detection.

关 键 词：Deep-UV phototransistors Organic semiconductors Molecular devices Single crystals OFETs 

分 类 号：TN3[电子电信—物理电子学]