Issue 56, 2018

High responsivity and 1/f noise of an ultraviolet photodetector based on Ni doped ZnO nanoparticles

Abstract

This study involves the novel fabrication of a high responsivity, fast response, and low-cost (UV) photodetector (PD) based on ZnO/Ni nanoparticles deposited on a glass substrate. The ZnO/Ni nanoparticles were synthesized using a polyol process. The structure and the morphology of the samples were characterized by X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). Optical properties were measured using UV-visible, diffuse reflectance and photoluminescence (PL) spectroscopy. The photodetector exhibited high photoresponse characteristics under 375 nm laser excitation. Our device shows a high responsivity (121 A W−1) with rise time (about 5.52 s) and fall time (about 12 s) at a bias voltage of 1 V. The device exhibits excellent reproducibility and stability characteristics with time. The noise spectra obtained from the UV photodetector were caused by the 1/f noise. The noise-equivalent power (NEP) is 1.08 × 10−9 W. Thus, the polyol process can be a useful and effective method for improving the performance of ZnO/Ni UV photodetectors.

Graphical abstract: High responsivity and 1/f noise of an ultraviolet photodetector based on Ni doped ZnO nanoparticles

Article information

Article type
Paper
Submitted
29 Jun 2018
Accepted
05 Sep 2018
First published
19 Sep 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 32333-32343

High responsivity and 1/f noise of an ultraviolet photodetector based on Ni doped ZnO nanoparticles

I. Ben Elkamel, N. Hamdaoui, A. Mezni, R. Ajjel and L. Beji, RSC Adv., 2018, 8, 32333 DOI: 10.1039/C8RA05567J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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