Comprehensive analysis of hybrid Si/MoS₂-PVA:CuO nanofiber heterojunctions: Achieving self-powered photodetection in UV-Vis-NIR region

Herein, CuO nanoparticles were synthesized via chemical deposition and combined with MoS2 nanosheets and PVA polymer to create a composite. To ensure the integrity of the MoS2-PVA:CuO nanofibers, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDS) analyses were performed. An excellent rectifier MoS2-PVA:CuO@Si heterojunction device with a dark rectification ratio of 1.24 x 10(5) was fabricated by electrospinning MoS2-PVA:CuO composite onto n-Si wafer. The photoelectrical analysis of the photosensitive device under varying white light intensity as well as under UV, IR and yellow light with a light power of 8 mW/cm(2) was investigated in detail by I-V measurements. The perfect photoresponse of the device under all light sources was obtained. Specifically, R, D, and NEP of 3.53 A/W, 3.17 x 10(13) Jones, and 1.73 x 10(-15) respectively, were attained at 590 nm and 8 mW/cm(2) for the optimum values. The highest EQE value was calculated as 799 % under 365 nm UV light. Time-dependent stability measurements of the device were repeated after 24 and 124 days and showed superb stability even without any encapsulation.

Journal

JOURNAL OF ALLOYS AND COMPOUNDS

Year

2025

Volume

1039

ISSN

0925-8388

eISSN

1873-4669

DOI

10.1016/j.jallcom.2025.182952

WoS UID

WOS:001562151400008