Improved responsivity and detectivity photodetector based on ZnO-rGO nanocomposite nanostructures

• Published in: Journal of materials science. Materials in electronics Vol. 34; no. 28; p. 1965
• Main Authors: Phukan, Palash, Narzary, Rewrewa, Sahu, Partha Pratim
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-10-2023; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemical vapor deposition; Chemistry and Materials Science; Hall effect; Materials Science; Nanocomposites; Optical and Electronic Materials; Photometers; Polyvinyl alcohol; Semiconductors; Zinc oxide; Zinc oxides
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-11338-1

Recently, ZnO has gained huge attention as a cutting-edge wide bandgap material for UV detection applications. But further enhancement of detectivity and responsivity of UV detection require enhanced conductivity and mobility. Here, we incorporated rGO in ZnO by simple chemical synthesis and fabricated a metal–semiconductor–metal (MSM) structure for UV detection. Hall measurement of ZnO-rGO composite confirms an increase of carrier by 63 times and mobility by 1.6 times compared to that of ZnO. As a result, MSM UV photodetector exhibits an enhanced responsivity of 78 A W
−1
and detectivity of 1.47 × 10
13
 cm Hz
5
 W
−1
with a fast response time of 6 s.