Ge/MoS2 Broadband Detectors

Science publishes a paper "Visible and infrared dual-band imaging via Ge/MoS2 van der Waals heterostructure" by Aujin Hwang, Minseong Park, Youngseo Park, Yeongseok Shim, Sukhyeong Youn, Chan-Ho Lee, Han Beom Jeong, Hu Young Jeong, Jiwon Chang, Kyusang Lee, Geonwook Yoo, Junseok Heo from Ajou University, Yonsei University, Soongsil University, KAIST, UNIST (Korea), and University of Virginia (USA).

"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."