A Broad Range (UV-Visible-NIR) Photodetector Based on N-Doped CQD/MoS2 (0D/2D) Quantum Dimensional Heterostructure

Abstract

Herein, an N-CQDs/MoS2 (0D/2D) hybrid dimensional heterostructure based broad range (UV to NIR) photodetector has been fabricated with two-dimensional (2D) layered MoS2 and zero-dimensional (0D) N-doped Carbon quantum dots. The fabricated heterostructure offers good optical and optoelectronic properties. A significant photoresponse has been observed for the incidence of all three UV, visible and NIR radiations. The fabricated heterostructure gives responsivity of 4.31 AW-1, 26.73 AW-1, and 20.72 AW-1 at 325 nm, 532 nm, and 1064 nm wavelengths. Also, recorded external quantum efficiency (EQE) spectra support the superior photovoltaic performance of the heterostructure. Recorded response time demonstrates that the fabricated heterostructure responds fast to all three radiations. Our findings show that N-CQDs/MoS2 heterostructure has a great potential in futuristic low-cost, non-toxic, and highly efficient photovoltaic devices for next-generation broad range photodetection applications.