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


Rouhi H. F., YILDIRIM F., Nuhzat S., Chenari H. M., AYDOĞAN Ş.

Journal of Alloys and Compounds, cilt.1039, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1039
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jallcom.2025.182952
  • Dergi Adı: Journal of Alloys and Compounds
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: MoS2-PVA:CuO@Si, composite nanofibers, NEP, Responsivity, Self-powered photodetector
  • Atatürk Üniversitesi Adresli: Evet

Özet

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 × 105 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/cm2 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 × 1013 Jones, and 1.73 × 10−15 respectively, were attained at 590 nm and 8 mW/cm2 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.