The synthesis and electrical characterization of Cu2O/Al:ZnO radial p-n junction nanowire arrays

Chien Lin Kuo, Ruey Chi Wang, Jow Lay Huang, Chuan Pu Liu, Chun Kai Wang, Sheng Po Chang, Wen Huei Chu, Chao Hung Wang, Chia Hao Tu

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Vertically aligned large-area p-Cu2O/n-AZO (Al-doped ZnO) radial heterojunction nanowire arrays were synthesized on silicon without using catalysts in thermal chemical vapor deposition followed by e-beam evaporation. Scanning electron microscopy and high-resolution transmission electron microscopy results show that poly-crystalline Cu2O nano-shells with thicknesses around 10nm conformably formed on the entire periphery of pre-grown Al:ZnO single-crystalline nanowires. The Al doping concentration in the Al:ZnO nanowires with diameters around 50nm were determined to be around 1.19at.% by electron energy loss spectroscopy. Room-temperature photoluminescence spectra show that the broad green bands of pristine ZnO nanowires were eliminated by capping with Cu2O nano-shells. The current-voltage (I-V) measurements show that the p-Cu2O/n-AZO nanodiodes have well-defined current rectifying behavior. This paper provides a simple method to fabricate superior p-n radial nanowire arrays for developing nano-pixel optoelectronic devices and solarcells.

Original languageEnglish
Article number365603
Issue number36
Publication statusPublished - 2009 Sep 9

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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