Photodetector Performance Under Blue -Green- Red Light in ZnTe Thin Films Grown by the Quasi-Closed Volume Method

Bayazıt T.

JOURNAL OF MATERIALS SCIENCE: MATERIALS IN ELECTRONICS, cilt.36, sa.2100, ss.1-13, 2025 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Sayı: 2100
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1007/s10854-025-16182-z
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE: MATERIALS IN ELECTRONICS
  • Derginin Tarandığı İndeksler: Scopus, Science Citation Index Expanded (SCI-EXPANDED), Chemical Abstracts Core, Compendex, INSPEC, MEDLINE
  • Sayfa Sayıları: ss.1-13
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

Zinc telluride (ZnTe) thin films were successfully fabricated using the Quasi-Closed Volume (QCV) method, providing stoichiometric and uniform layers suitable for visible-light photodetector applications. XRD and SEM analyses confirmed a cubic ZnTe phase with densely packed grains, while optical studies revealed a direct bandgap of ~2.20 eV. Electrical measurements indicated p-type conductivity with a resistivity of 1.01×104 Ω·cm and a hole mobility of 0.445 m2 V-1 s-1. The photodetector exhibited wavelength-dependent behavior, showing maximum sensitivity (465%), responsivity (0.59 mA/W), and detectivity (6.9×106 Jones) under blue light (443 nm). The response (26 ms) and recovery (13 ms) times confirm its rapid photoresponse. The sublinear photocurrent–power relationship (I ∝ P0.62) indicates trap-controlled conduction dominated by native defects. These findings demonstrate that QCV-grown ZnTe thin films possess stable and reproducible photoresponse characteristics, highlighting their potential for cost-effective, rapid-response visible-light photodetectors.