MoS2/pentacene hybrid complementary inverter based photodetector with amplified voltage–output. (19th October 2020)

• Record Type: Journal Article
• Authors: Liu, Fengjing; Zhang, Yiwei; Wang, Jiawei; Chen, Yiyi; Wang, Liang; Wang, Gongtang; Dong, Ji; Jiang, Chao
• Is Part Of: Nanotechnology. Volume 32:Number 1(2021)
• Publication Date: 2020-10-19
• Subjects: MoS2/perovskite heterojunction -- pentacene thin film transistor -- photodetector -- MAPbI3 -- CMOS inverter; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/abb9da
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: A sensitive photodetection based on a novel hybrid CMOS inverter has been demonstrated. Unlike common photo-current type photodetectors, which convert optical signals to current, the CMOS inverter realizes voltage–output, overcoming the difficulty to monitor current signal in the range of nA . The hybrid CMOS logic inverter employs n-channel MoS2 nanosheet/perovskite heterojunction FET and p-channel organic pentacene FET in a planar architecture. In order to obtain high performance, we adopt the interdigital electrodes for the pentacene FET to enhance the current density of the p-channel, and stack perovskite on the MoS2 channel to modify the threshold voltage of the n-channel. As a result, a CMOS inverter with a voltage gain of more than ten is obtained. When VIN is around the transition voltage (−38 V), the inverter can obtain stable optical detection signal, the VOUT changes from 6 V in dark to 1 V under 633 nm light exposure. This finding indicates the potential to fabricate visible light detecting devices with voltage–output based on the inverter and may be further applicable for a photo-logic circuit.