Electro-photo modulation of the fermi level in WSe2/graphene van der Waals heterojunction |
| |
| Affiliation: | 1. State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073, China;2. College of Computer, National University of Defense Technology, Changsha 410073, China;3. College of Science, National University of Defense Technology, Changsha 410073, China;4. College of Opto-Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;1. Department of Physics, Urmia Branch, Islamic Azad University, Urmia, Iran;2. Department of Solid State Physics, Yerevan State University, Alex Manoogian 1, 0025 Yerevan, Armenia;1. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;2. Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215125, China;1. FLNR, JINR, Joliot-Curie 6, 141980 Dubna, Russia;2. CFEL at DESY, Notkestr. 85, 22607 Hamburg, Germany;3. NRC Kurchatov Institute, Kurchatov Sq. 1, 123182 Moscow, Russia;4. LPI of the Russian Academy of Sciences, Leninskij prospekt, 53, 119991 Moscow, Russia;1. Nanomaterials Group, Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran;2. School of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran |
| |
| Abstract: | We report an electro-photo double modulation of the fermi level in a WSe2/graphene heterojunction. The heterojunction exhibits high ION/IOFF ratio (~103) in transfer characteristic in dark and distinct rectification behavior in output characteristic under light illumination, respectively. Time-dependent photoresponse reveals that the heterojunction has a considerable potential in the application of photodetection. Interestingly, an exotic current peak is observed in transfer characteristic under light illumination. This novel behavior is attributed to the tunable fermi level at the WSe2/graphene heterojunction by electro-photo double modulation. The results may be helpful to develop tunable photovoltaic optoelectronics based on van der Waals heterojunctions. |
| |
| Keywords: | Rectification Photodetection Photovoltaic Fermi level Current peak |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
