Photodetectors based on small-molecule organic semiconductor crystals*

Project supported by the National Natural Science Foundation of China (Grant Nos. 51672180, 51622306, and 21673151), Collaborative Innovation Center of Suzhou Nano Science & Technology, the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the 111 Project, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices.
Pan Jing, Deng Wei, Xu Xiuzhen, Jiang Tianhao, Zhang Xiujuan †, Jie Jiansheng ‡
       

(a) Optical microscopy images of OPTs based on C60-DPTTA and C70-DPTTA cocrystals. (b) Transfer characteristics of the ambipolar device in dark (red line) and illumination (blue) conditions. (a), (b) Reproduced with permission.[39] Copyright 2013, American Chemical Society. (c) Schematic illustration of the capillary tube induced self-assembly of TCNQ crystals. (d) Optical microscopy image of a TCNQ-based OPT. (e) Output characteristics of a TCNQ-based OPT at low gate and source-drain voltages. (c)–(e) Reproduced with permission.[40] Copyright 2011, The Royal Society of Chemistry. (f) Optical microscopy image of a single PTCDI-C8 nanowire OPT with different channel lengths. (g) The normalized photocurrent spectra of PTCDI-C8-based OPTs with different channel lengths versus the normalized absorption spectra of PTCDI-C8. (h) Temporal response of a single PTCDI-C8 nanowire OPT with different channel lengths under 500 nm light. (f)–(h) Reproduced with permission.[42] Copyright 2018, American Chemical Society.