A high mobility air-stable n-type organic small molecule semiconductor with high UV-visible-to-NIR photoresponse  

作　　者：YING-SHI GUAN JING QIAO YINGYING LIANG HARI KRISHNA BISOYI CHAO WANG WEI XU DAOBEN ZHU QUAN LI 

机构地区：[1]Institute of Advanced Materials and School of Chemistry and Chemical Engineering,Southeast University,211189 Nanjing,China [2]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids Institute of Chemistry,Chinese Academy of Sciences,100190 Beijing,China [3]Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program,Kent State University,Kent,OH 44242,USA

出　　处：《Light(Science & Applications)》2022年第9期2140-2146,共7页光（科学与应用)（英文版）

基　　金：support from Jiangsu Innovation Team Program,National Key R&D Program of China(Grant No.2017YFA0204701);and the Fundamental ResearchFunds for the Central Universities.

摘　　要：An organic semiconductor with high carrier mobility and efficient light absorption over a wide spectral range is of the most important yet challenging material for constructing a broadband responsive organic photodetector.However,the development of such organic semiconductors,especially for air-stable n-type organic small molecule semiconductors,is still at an early stage.Here we report the fabrication of high-performance n-type semiconducting crystalline nanosheets and the development of air-stable field-effect transistors,phototransistors,with high response over a broad spectrum.The n-type small molecule semiconductor is assembled into a crystalline nanosheet based on the solvent-phase interfacial self-assembly method.N-type field-effect transistors with high electron mobility are fabricated and their electrical performances exhibit excellent air stability.Impressively,the demonstrated phototransistors exhibit an ultrahigh responsivity over a wide spectral range from 365 to 940 nm,with a maximum photoresponsivity of 9.2×10^(5) AW-1 and specific detectivity of 5.26×10^(13) Jones,which is the best performance among the reported n-type organic small molecule-based phototransistors.

关 键 词：HIGH visible CRYSTALLINE 

分 类 号：TN30[电子电信—物理电子学]