High-Response, Ultrafast-Speed, and Self-Powered Photodetection Achieved in InP@ZnS-MoS2 Phototransistors with Interdigitated Pt Electrodes
| Autor: | Dongxiao Lu, Kaixi Shi, Xueying Chu, Beilong Zhang, Guo Liang, Li Jinhua, Youcheng Xiao, Federico Rosei, Yingjiao Zhai |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Schottky barrier Photodetector 02 engineering and technology Photodetection 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Resonator Neuromorphic engineering Electrode Optoelectronics General Materials Science 0210 nano-technology business Ultrashort pulse Plasmon |
| Zdroj: | ACS Applied Materials & Interfaces. 12:31382-31391 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Various hybrid zero-dimensional/two-dimensional (0D/2D) systems have been developed to fabricate phototransistors with better performance compared to two-dimensional (2D) layered materials as well as broaden potential applications. Herein, we integrated environment-friendly InP@ZnS core-shell QDs with high efficiency of light absorption and light-emitting properties with bilayer MoS2 for the realization of 0D/2D mixed-dimensional phototransistors. Interdigitated (IDT) electrodes with Pt-patterned arrays, acting as light collectors as well as plasmonic resonators, can further enhance light harvesting from the InP@ZnS-MoS2 hybrid phototransistors, contributing to achieving a photoresponsivity as high as 1374 A·W-1. Moreover, thanks to the asymmetric Pt/MoS2 Schottky junction at the source/drain contact, a self-powered characteristic with an ultrafast speed of 21.5 μs was achieved, which is among the best performances for 2D layered material-based phototransistors. In terms of these features, we demonstrated the artificial synapse network with short-time plasticity based on the self-powered photodetection device. Our work reveals the great potential of 0D/2D hybrid phototransistors for high-response, ultrafast-speed, and self-powered photodetectors coupled with artificial neuromorphic function. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|