Highly responsive self-driven broadband hybrid photodetector with high detectivity and on/off ratio based on <i>Hibiscus sabdariffa</i>

Yuca H., Karakaya S., Yıldırım F., İncekara Ü., Aydoğan Ş.

PHYSICA SCRIPTA, cilt.98, sa.12, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 98 Sayı: 12
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1088/1402-4896/ad0de0
  • Dergi Adı: PHYSICA SCRIPTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH
  • Atatürk Üniversitesi Adresli: Evet

Özet

A Hibiscus sabdariffa (HBS)/n-Si hybrid photodetector was fabricated and it was observed that the device has a high rectification ratio of 10.2 x 10(4) in dark and superior photoresponse at different intensities of visible light in addition to UV and IR lights. The non-linear response to light intensity in visible light was attributed to phase change effects and the presence of traps, which are the result of the hibiscus sabdariffa' response to light. The responsivity at 850 nm reaches 1.16 A W-1 (at V = -2.0 V) and a high specific detectivity of 2.0 x 10(12) Jones (for self-driven mode) with an external quantum efficiency of 411% was obtained. In addition, in self-driven mode of UV and IR lights, the highest on/off ratio and NPDR values reached similar to 10(5) and similar to 10(9) W-1 levels, respectively. Moreover, HBS/n-Si hybrid broad-band photodetector showed long-term stability (40 days) without encapsulation both in the dark and under the light.