Improvement of n-ZnO/p-Si photodiodes by embedding of silver nanoparticles

Zhan Shuo Hu, Fei Yi Hung, Shoou Jinn Chang, Kuan Jen Chen, Yi Wei Tseng, Bohr Ran Huang, Bo Cheng Lin, Wei Yang Chou, Jay Chang

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11 Citations (Scopus)


The photo-current of n-ZnO/p-Si heterojunction photodiodes was improved by embedding Ag nanoparticles in the interface (ZnO/nano-PAg/p-Si), and the ratio between photo- and dark-current increased by about three orders more than that of a n-ZnO/p-Si specimen. The improvement in the photo-current resulted from the light scattering of embedded Ag nanoparticles. The I-V curve of n-ZnO/p-Si degraded after thermal treatment (A-ZnO/p-Si) because the silicon robbed the oxygen from ZnO to form amorphous silicon dioxide and left an oxygen vacancy. Notably, the properties of ZnO/nano-PAg/p-Si were better in the time-dependent photoresponse under 10 V bias. Ag nanoparticles (15-20 nm) scattered the UV light randomly and increased the probability for the absorption of ZnO to enhance the properties of the photodiode.

Original languageEnglish
Pages (from-to)4757-4763
Number of pages7
JournalJournal of Nanoparticle Research
Issue number10
Publication statusPublished - 2011 Oct

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics


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