Exploring Temperature-Dependent bandgap and Urbach energies in CdTe thin films for optoelectronic applications

Surucu O., Sürücü G., Hasanli N., Parlak M., Isik M.

Materials Letters, cilt.373, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 373
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.matlet.2024.137078
  • Dergi Adı: Materials Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Optical materials and properties, Solar energy materials, Sputtering, Thin Films
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

This study examines CdTe thin films deposited via RF magnetron sputtering, focusing on structural and optical properties. X-ray diffraction, Raman spectroscopy, and SEM assessed structural characteristics. Optical properties were analyzed through transmittance measurements from 10 to 300 K. Tauc plots and Varshni modeling revealed a temperature-dependent bandgap, increasing from 1.49 eV at room temperature to 1.57 eV at 10 K. Urbach energy rose from 82.7 to 93.7 meV with temperature. These results are essential for applications where temperature affects CdTe-based device performance.