Fabrication of copper oxide nanostructures for visible-light photodetector

Cu(II)O has emerged as a promising material for numerous applications including photodetectors due to its narrow bandgap (1.5 eV), environmentally innocuous nature, low cost, and ease of fabrication. Herein, the optoelectrical investigation of polycrystalline cupric oxide (Cu(II)O) based photodetectors has been studied. The Cu(II)O film has been fabricated over FTO substrate which has been assembled into a sandwich structured photodetector device to record the current-voltage (I-V) and current-time (I-t) characteristics. The fabricated device demonstrates responsivity of 60 mA/W and detectivity of 1.9 x 108 Jones. The proposed process is facile, low cost and even suitable for flexible photodetectors. Furthermore, the Cu (II)O films exhibit promising photon sensing characteristics in visible and near UV light illumination and can be explored for various other applications in photodetection and photovoltaic studies. Copyright (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Virtual Conference on Advanced Nanomaterials and Applications