The analyzing of I-V performance of PbO2/n-Si heterojunction in the wide temperature range

DENİZ A. R.

Journal of Alloys and Compounds, cilt.888, 2021 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Derleme
  • Cilt numarası: 888
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.jallcom.2021.161523
  • 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: Capacitance-Voltage, Current- Voltage, Lead oxide, Schttoky diode
  • Hakkari Üniversitesi Adresli: Evet

Özet

In this study, lead oxide (PbO2) was used as interface material in Schottky diode applications. The morphological properties of PbO2 were analyzed by using Scanning Electron Microscopy (SEM). The n-Si crystal was used as the base material and PbO2 material was coated on the crystal with spin coating (1000 rpm for 3 min). Thus, reference diode and PbO2/n-Si heterojunctions were fabricated. The barrier height (Φb) and ideality factor (n) values were calculated using room temperature current-voltage (I-V) characteristic of these diodes. These values were calculated as n = 1.24, Φb = 0.84 for Ni/n-Si/Al diode and n = 1.91, Φb = 0.77 for Ni/PbO2/n-Si/Al heterojunction. In addition, the n, Φb and series resistance (Rs) values of the PbO2/n-Si diode were calculated for different temperature values (120–300 K). It was determined that the diode parameters were strongly dependent on the temperature. It was observed that the change in the Φb and n values of the diode with temperature showed a double Gaussian distribution. Also, capacitance-voltage (C-V) measurements for different frequency values of PbO2/n-Si heterojunction were analyzed at the 300 K. It was observed that the diode capacitance decreased with the increasing frequency.