Highly sensitive self-powered UV-visible photodetector based on ZrO2-RGO nanofibers/n-Si heterojunction

YILDIRIM F., Khalili S., ORHAN Z., Chenari H. M., AYDOĞAN Ş.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.935, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 935
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.jallcom.2022.168054
  • 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, Communication Abstracts, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: ZrO 2-RGO, Nanofibers, Self -powered photodetector, Responsivity, ON, OFF ratio, Detectivity, SPECTRAL RESPONSE, HIGH-DETECTIVITY, ULTRAFAST, DARK
  • Atatürk Üniversitesi Adresli: Evet

Özet

Nanoscale microstructures such as nanofibers (NFs) have the potential to be widely used in optoelectronics as they minimize the interfacial effects. A low-cost and easily prepared the ZrO2-RGO NFs/n-Si heterojunction photodetector was fabricated and its photodetector performance were reported in the present work. The morphological, structural, and optical analyses of the ZrO2-RGO NFs were achieved by scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-Vis diffuse reflectance spectroscopy (DRS), respectively. The device yields a rectification ratio of 37384. It was observed that the ZrO2-RGO NFs/n-Si photodetector fabricated under the same conditions gave a high response to light in both the visible and UV spectral regions in addition to the self-powered mode. Compared to the reverse current measured in the dark, the ZrO2-RGO NFs/n-Si heterojunction gives quite high reverse current even in ambient light as high as an order of three, making it a candidate photodetector for low light intensities. The ON/OFF ratio reached up to 6.1 x 103 and 5.5 x 103 for 150 mW/cm2 for visible light and UV (365 nm), respectively (at -2.0 V).(c) 2022 Elsevier B.V. All rights reserved.