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Electrochemical Deposition of ZnO Nanorods on Transparent Reduced Graphene Oxide Electrodes for Hybrid Solar Cells

  1. Zongyou Yin,
  2. Shixin Wu,
  3. Xiaozhu Zhou,
  4. Xiao Huang,
  5. Qichun Zhang,
  6. Freddy Boey,
  7. Hua Zhang*

Article first published online: 28 DEC 2009

DOI: 10.1002/smll.200901968

Issue

Small

Small

Volume 6, Issue 2, pages 307–312, January 18, 2010

Additional Information

How to Cite

Yin, Z., Wu, S., Zhou, X., Huang, X., Zhang, Q., Boey, F. and Zhang, H. (2010), Electrochemical Deposition of ZnO Nanorods on Transparent Reduced Graphene Oxide Electrodes for Hybrid Solar Cells. Small, 6: 307–312. doi: 10.1002/smll.200901968

Author Information

  1. School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue, Singapore 639798 (Singapore)

*School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue, Singapore 639798 (Singapore).

Publication History

  1. Issue published online: 14 JAN 2010
  2. Article first published online: 28 DEC 2009
  3. Manuscript Received: 18 OCT 2009

Funded by

  • NTU
  • AcRF Tier 1. Grant Number: RG 20/07
  • A*STAR SERC Grant. Grant Number: 092 101 0064

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Keywords:

  • electrochemical deposition;
  • hybrid solar cells;
  • nanorods;
  • reduced graphene oxide

Abstract

Monocrystalline ZnO nanorods (NRs) with high donor concentration are electrochemically deposited on highly conductive reduced graphene oxide (rGO) films on quartz. The film thickness, optical transmittance, sheet resistance, and roughness of rGO films are systematically studied. The obtained ZnO NRs on rGO films are characterized by X-ray diffraction, transmission electron microscopy, photoluminescence, and Raman spectra. As a proof-of-concept application, the obtained ZnO NRs on rGO are used to fabricate inorganic–organic hybrid solar cells with layered structure of quartz/rGO/ZnO NR/poly(3-hexylthiophene)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (P3HT/PEDOT:PSS)/Au. The observed power conversion efficiency (PCE, η), ≈ 0.31%, is higher than that reported in previous solar cells by using graphene films as electrodes. These results clearly demonstrate that rGO films with a higher conductivity have a smaller work function and show a better performance in the fabricated solar cells.

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