Environmental-Friendly Ag2S QD-Multilayer MoSe2 van Der Waals Heterostructure for High-Performance Broadband Photodetection

• DOI: 10.1021/acsami.4c00129
• Publication Date: 2024-04-11T05:23:35Z
• Authors: Yaru Shi; Mingxiu Liu; Yuting Zou; Yahui Li; Xingyu Zhao; Junru An; Mengqi Che; Fan Tan; Xiaojuan Sun; Dabing Li; Shaojuan Li
• Keywords: Photodetection; Quantum Efficiency

Broadband photodetectors have drawn intensive attention owing to their wide application prospects in optical communication, imaging, astronomy, and so on. Two-dimensional transition-metal dichalcogenides (TMDs) are considered as highly potential candidates for photodetection applications, benefiting from excellent photoelectric properties. However, most of the based on TMDs suffer low performance near-infrared (NIR) region due weak absorption efficiency near band edge, which severely constrains usage broadband optoelectronics. Here, by taking advantage high coefficient environment-friendly property Ag2S quantum dots (QDs), hybrid multilayer MoSe2/Ag2S QDs is demonstrated with a high-performance capability (532–1270 nm). The favorable energy alignment facilitates effective separation collection photogenerated carriers, heterostructure device exhibits significant enhancement compared bare MoSe2 device. High responsivity, detectivity, external 25.5 A/W, 1.45 × 1011 Jones, 1070% obtained at working voltage 1 V under 980 nm illumination. responsivity can reach up 1.2 A/W 1270 wavelength, competitive commercial NIR photodetectors. Meanwhile, imaging demonstrated. Our work may open facile eco-friendly approach construct next-generation compact optoelectronic applications.