Affiliation of Author(s):[1] Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China; [2] College of Energy, Soochow Institute for Energy and Materials Innovations, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China; [3] School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China; [4] State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610065, China; [5] School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
Journal:Nanotechnology
Key Words:Polymer films - Photodetectors - Photons - Molybdenum compounds
Abstract:An ultrathin near-perfect MoSe2 absorber working in the visible regime is demonstrated theoretically and experimentally, and it consists of a MoSe2/Au bi-layer film. The polymer-assisted deposition method is used to synthesize MoSe2 films, which can reduce the roughness and thus improve the film absorption. Simulation results show that the absorption of the absorber with 22 nm MoSe2 reaches to larger than 90% between 628.5 nm and 718 nm with a peak value up to 99.5% at 686 nm. Moreover, the measured absorption also shows near-perfect absorption of this simple absorber. Finally, an ultrathin photodetector is fabricated based on this perfect absorber and shows on/off reproducibility and remarkable photocurrent, which is three orders of magnitude higher than the dark current. ? 2020 IOP Publishing Ltd.
Document Type:Journal article (JA)
Volume:31
Issue:22
ISSN No.:09574484
Translation or Not:no