Ultraviolet/Visible Photodetectors Based on p-n NiO/ZnO Nanowires Decorated with Pd Nanoparticles

Cheng Liang Hsu, Yu Che Wang, Sheng Po Chang, Shoou Jinn Chang

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Chemical solutions consisting of NiO/ZnO p-n heterojunction nanowires (NWs) decorated with Pd nanoparticles on a glass substrate were used to fabricate an ultraviolet (UV)/visible photodetector. The photodetector was composed of ZnO hexagonal wurtzite and NiO cubic crystalline structures. A few NiO nanograins were found to epitaxially grow on the ZnO NW surface. The current-voltage curve for the photodetector exhibited rectification in the dark and under green and blue light-emitting diode (LED) illumination, whereas an approximately linear current-voltage curve was found under UV LED illumination. The Igreen/Idark, Iblue/Idark, and IUV/Idark ratios for the photodetector were 91.4, 403.2, and 1.25 × 105, respectively. Multilayer structures of the photodetector are sensitive toward the UV and visible bands.

Original languageEnglish
Pages (from-to)6343-6351
Number of pages9
JournalACS Applied Nano Materials
Issue number10
Publication statusPublished - 2019 Oct 25

All Science Journal Classification (ASJC) codes

  • General Materials Science


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