Surface doping effect on the optoelectronic performance of 2D organic crystals based on cyano-substituted perylene diimides

作     者：Jaeyong Ahn Zhenping Li Zhiwei Wang Ke Gao Huagui Zhuo Wanuk Choi Gang Chang Xiaobo Shang Joon Hak Oh 

作者机构：School of Chemical and Biological EngineeringInstitute of Chemical ProcessesSeoul National UniversitySeoul 08826South Korea State Key Laboratory for Mechanical Behavior of MaterialsShaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Center for Ordered Nanoporous Materials SynthesisSchool of Environmental Science and EngineeringPohang University of Science and TechnologyGyeongbuk 37673South Korea Instrumental Analysis Center of Xi’an Jiaotong UniversityXi’an 710049China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第9期

页      面：193-197页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by the National Research Foundation(NRF)of Korea(Nos.2023R1A2C3007715,2021R1A4A1032515,RS-2023-00281944) funded by the Ministry of Science and ICT(MSIT)of Korea Korea Toray Science Foundation,Shaanxi Fundamental Science Research Project for Chemistry&Biology(No.22JHQ035) Natural Science Basic Research Program of Shaanxi Province(No.2024JC-YBMS-081) 

主　　题：Doping effect Phototransistors Perylene diimides Organic crystals Cyano substitution 

摘      要：Compared to organic thin films,organic single crystals offer significant potential in organic phototransistors(OPTs)due to their enhanced charge transport,large surface area,and defect-free ***,the development of n-type semiconductors has lagged behind p-type *** enhance semiconductor device performance,a doping process can be employed,which typically involves the introduction of charged impurities into the crystalline semiconducting *** aim is to reduce the Ohmic losses,increase carrier density,improve transport capabilities,and facilitate effective carrier injection,ultimately enhancing the electrical properties of the *** doping processes,however,often pose a risk of damaging the structure of single *** this study,we have synthesized novel cyanosubstituted chiral perylene diimides,which self-assemble into two-dimensional single crystals that can be used for n-type semiconductor *** have employed a surface doping strategy using diethylamine vapor without disrupting the crystal *** fabricated devices exhibit significantly higher charge transport properties after doping,achieving a maximum electron mobility of 0.14 cm^(2)V^(-1)s^(-1),representing an improvement of over ***,the optoelectronic performance of the doped devices has significantly improved,with the external quantum efficiency increased by over 9 times and the significantly improved response *** results suggest that our surface doping technology is a promising way for enhancing the performance of 2D organic single-crystal OPTs.