Details

Autor(en) / Beteiligte

• Cao, Xinyu
• Yan, Shaohua
• Li, Zhiteng
• Fang, Zhenghui
• Wang, Lin
• Liu, Xiaofeng
• Chen, Zhengwei
• Lei, Hechang
• Zhang, Xiao

Titel

Broadband Photodetector Based on FePS 3 /WS 2 van der Waals Type II Heterostructure

Ist Teil von

• The journal of physical chemistry letters, 2023-12, Vol.14 (50), p.11529-11535

Ort / Verlag

United States

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In order to understand broadband photodetectors from ultraviolet-visible (UV-vis) to the near-infrared range, one needs to find novel two-dimensional (2D) van der Waals (vdW) materials with broadband optoelectronic performance. Transition metal phosphorus sulfides (TMPSs) have been reported as a new type of vdW material with generally broadband and p-type conductivity. Here, we report a high-performance and broadband photodetector consist of p-type FePS and n-type WS with a working range of 405-785 nm. The maximum values of responsivity and specific detectivity are 32.5 mA/W and 1.73 × 10 jones at 405 nm and 2 V bias, which are better than those of its individual constituents and many other 2D vdW heterostructures. The high performance of the FePS /WS photodetector is attributed to the built-in electric field in the FePS /WS p-n heterostructure and type II band alignment. Present study demonstrates that the material family of TMPSs could be a promising platform for broadband photodetector applications.