Long-term stable and high responsivity visible-ultraviolet photodetector of Se-doped CdO film on Si by spin coating

CEVİZ ŞAKAR B., ORHAN Z., Yildirim F., AYDOĞAN Ş.

JOURNAL OF PHYSICS D-APPLIED PHYSICS, cilt.56, sa.34, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 56 Sayı: 34
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1088/1361-6463/acd461
  • Dergi Adı: JOURNAL OF PHYSICS D-APPLIED PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: CdO, heterojunction, UV photodetector, responsivity, detectivity, SENSITIZED SOLAR-CELLS, HETEROJUNCTION, NANOSTRUCTURES, TEMPERATURE, NANOWIRES, JUNCTION, GROWTH
  • Atatürk Üniversitesi Adresli: Evet

Özet

Se-doped CdO thin films were prepared on p-Si substrates via spin coating. Morphological, structural and absorption measurements of CdO:Se film was performed. Then, a CdS:Se/p-Si heterojunction was produced by coating CdO:Se film on a p-Si substrate using spin coating method. From the I-V measurements, it has been seen that the device has a very good rectification feature in the dark, at room temperature. In order to investigate the performance of the device under light, a detailed analysis was performed by performing I-V measurements under ultraviolet (UV) light (365 and 395 nm, 10 mW cm(-2)) and different intensities of visible light (between 10 and 125 mW cm(-2)) as well as ambient light. It was observed that the CdO:Se/p-Si heterojunction performed well under both illumination conditions. The maximum responsivity and specific detectivity values were obtained as 0.72 and 4.47 A W-1 and 3.31 x 10(9) and 2.05 x 10(10) Jones for visible and UV regions, respectively. It was also seen that the device exhibited very high performance and stability even after 160 days.