Fabrication and characterization of ultraviolet photosensors from ZnO nanowires prepared using chemical bath deposition method

Ahmed S. Al-Asadi, Luke Alexander Henley, Sujoy Ghosh, Abdiel Quetz, Igor Dubenko, Nihar Pradhan, Luis Balicas, Nestor Perea-Lopez, Victor Carozo, Zhong Lin, Mauricio Terrones, Saikat Talapatra, Naushad Ali

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24 Scopus citations

Abstract

Highly crystalline zinc oxide (ZnO) nanowires (NWs) were synthesized through chemical bath deposition (CBD) method by using a simple seeding technique. The process includes dispersion of commercially available ZnO nanoparticles through spraying on a desired substrate prior to the CBD growth. A typical growth period of 16 h produced ZnO NW assemblies with an average diameter of ∼45 nm and lengths of 1-1.3 μm, with an optical band gap of ∼3.61 eV. The as-prepared ZnO NWs were photoactive under ultra violet (UV) illumination. Photodetector devices fabricated using these NW assemblies demonstrated a high photoresponse factor of ∼40 and 120 at room temperature under moderate UV illumination power of ∼250 μW/cm2. These findings indicate the possibility of using ZnO NWs, grown using the simple method discussed in this paper, for various opto-electronic applications.

Original languageEnglish (US)
Article number084306
JournalJournal of Applied Physics
Volume119
Issue number8
DOIs
StatePublished - Feb 28 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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