The effect of temperature on the electrical characteristics of Ti/n-GaAs Schottky diodes

Durmuş H., Tataroğlu A., Altındal Ş., Yıldırım M.

Current Applied Physics, cilt.44, ss.85-89, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 44
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.cap.2022.09.015
  • Dergi Adı: Current Applied Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.85-89
  • Anahtar Kelimeler: Schottky diode, Temperature effect, Ideality factor, Barrier inhomogeneities, Series resistance, Gaussian distribution, semiconductor?s forbidden band gap [4]
  • Gazi Üniversitesi Adresli: Evet

Özet

© 2022 Korean Physical SocietySchottky diodes still attract researchers as they are used in various device applications. This study provides I–V characteristics of Ti/n-GaAs (80–300 K). Higher barrier height (ΦB0) values were obtained for higher temperatures, whereas the ideality factor exhibited the opposite behavior. This was associated with a barrier inhomogeneity at the Ti/GaAs interface, which has a Gaussian distribution (GD). The mean barrier height values calculated from the modified Richardson and ΦB0 - q/2 kT plots were found to be 0.584 eV and 0.575 eV in the temperature range of 80–160 K. They were found as 1.041 eV and 1.033 eV between 180 K and 300 K, respectively. The modified Richardson constant value, on the other hand, was calculated as 22.06 A cm−2 K−2 (80–160 K) and 13.167 A cm−2 K−2 (180–300 K). These values are higher than the theoretical value for n-GaAs, which is 8.16 A cm−2 K−2. This difference may stem from intense inhomogeneity at the Ti/n-GaAs interface.