The impact of laser energy on the photoresponsive characteristics of CdO/Si visible light photodetector

Bashir, Mohamed Bashir Ali and Salih, Ethar Yahya and Rajpar, Altaf Hussain and Bahmanrokh, Ghazaleh and Mohd Sabri, Mohd Faizul (2022) The impact of laser energy on the photoresponsive characteristics of CdO/Si visible light photodetector. Journal of Micromechanics and Microengineering, 32 (8). ISSN 0960-1317, DOI

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In this article, cadmium oxide (CdO) was deposited using pulsed laser deposition approach on porous silicon (Si) wafer for visible light photodetector application, through which a series of devices were proposed as a function of the deposition energy. The microstructural as well as optical characteristics of the prepared film/s were demonstrated, respectively, using x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and ultraviolet visible light spectroscopy (UV-Vis) analysis. In details, the UV-Vis analysis revealed the occurrence of optical band gaps within the range of 2.38-2.42 eV, while an average nanoparticle diameter was found to be 45 nm using FE-SEM technique. This in turn demonstrated a sound relation with the photoresponsive behavior of the attained photodetectors. A photoresponsivity and specific detectivity of 1.9 mu A mW(-1) and 1.21x10(9) Jones were attained using 700 mJ laser energy. In the meanwhile, the estimated response/recover time of the addressed laser energy was found to be 300 s and 340 s, respectively. The photo-responsive characteristics of the fabricated devices were found to be in positive linear correlation with the applied laser energy.

Item Type: Article
Funders: Ministry of Education in Saudi Arabia (Grant No: 375213500), Central laboratory at Jouf University
Uncontrolled Keywords: CdO/Si visible light photodetector; Pulsed laser deposition; Photo-responsivity; Response/recovery time
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Oct 2023 02:12
Last Modified: 20 Oct 2023 02:12

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