Multispectral photodetectors are emerging devices capable of detecting photons in multiple wavelength ranges, such as visible (VIS), near infrared (NIR), etc. Image data acquired with these photodetectors can be used for effective object identification and navigations owing to additional information beyond human vision, including thermal image and night vision. However, these capabilities are hindered by the structural complexity arising from the integration of multiple heterojunctions and selective absorbers. In this paper, we demonstrate a Ge/MoS2 van der Waals heterojunction photodetector for VIS- and IR-selective detection capability under near-photovoltaic and photoconductive modes. The simplified single-polarity bias operation using single pixel could considerably reduce structural complexity and minimize peripheral circuitry for multispectral selective detection. The proposed multispectral photodetector provides a potential pathway for the integration of VIS/NIR vision for application in self-driving, surveillance, computer vision, and biomedical imaging.
|Publication status||Published - 2021 Dec|
Bibliographical noteFunding Information:
Industrial Strategic Technology Development Program (20000300) funded by the Ministry of Trade, Industry, and Energy (MOTIE, Republic of Korea), and the National R&D Program through the National Research Foundation of Korea, funded by the Ministry of Science and ICT (2020M3F3A2A01082593) and National Science Foundation (NSF) (grant no. 1942868).
Copyright © 2021 The Authors, some rights reserved.
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