UV photodetector behavior of 2D ZnO plates prepared by electrochemical deposition

► ZnO with 2D hexagonal structure was successfully prepared using electrochemical method. ► The study found the maximum response of the UV photodetector was in the range of 300–350nm. ► The internal gain of the ZnO photodetector was 2.7 at low UV intensity. Zinc oxide (ZnO) with 2D hexagonal structu...

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Bibliographic Details
Published in:Superlattices and microstructures 2012-06, Vol.51 (6), p.765-771
Main Authors: Al-Hardan, N.H., Abdullah, M.J., Ahmed, N.M., Yam, F.K., Abdul Aziz, A.
Format: Article
Language:English
Subjects:
2D structure
Deposition
Diffraction
Electrochemical deposition
Microstructure
Orientation
Quartz
Thin films
Two dimensional
UV photodetector
X-rays
Zinc oxide
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Summary:► ZnO with 2D hexagonal structure was successfully prepared using electrochemical method. ► The study found the maximum response of the UV photodetector was in the range of 300–350nm. ► The internal gain of the ZnO photodetector was 2.7 at low UV intensity. Zinc oxide (ZnO) with 2D hexagonal structure was successfully prepared using electrochemical deposition (ECD) method on a quartz substrate pre-coated with indium-doped ZnO layer. The X-ray diffraction of the prepared sample confirmed that the hexagonal structure had a dominant c-axis orientation. The scanning electron microscopy revealed the 2D hexagonal structure of the prepared ZnO. An ultraviolet (UV) photodetector based on the prepared ZnO was fabricated using two parallel palladium thin films as electrodes. The maximum response of the UV photodetector was in the range of 300–350nm wavelength. The internal gain of the ZnO photodetector was 2.7 at low UV intensity. The response and the recovery times were estimated to be 26 and 11s, respectively.
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2012.03.030