Nano Research

, Volume 4, Issue 10, pp 979–986

CuI-Si heterojunction solar cells with carbon nanotube films as flexible top-contact electrodes

Authors

  • Peixu Li
    • Department of Mechanical EngineeringTsinghua University
  • Shanshan Wang
    • College of Chemistry and Molecular EngineeringPeking University
    • College of EngineeringPeking University
  • Yi Jia
    • Department of Mechanical EngineeringTsinghua University
  • Zhen Li
    • Department of Mechanical EngineeringTsinghua University
  • Chunyan Ji
    • College of EngineeringPeking University
  • Luhui Zhang
    • College of EngineeringPeking University
  • Hongbian Li
    • College of EngineeringPeking University
  • Enzheng Shi
    • College of EngineeringPeking University
  • Zuqiang Bian
    • College of Chemistry and Molecular EngineeringPeking University
  • Chunhui Huang
    • College of Chemistry and Molecular EngineeringPeking University
  • Jinquan Wei
    • Department of Mechanical EngineeringTsinghua University
  • Kunlin Wang
    • Department of Mechanical EngineeringTsinghua University
  • Hongwei Zhu
    • Department of Mechanical EngineeringTsinghua University
    • Center for Nano and Micro MechanicsTsinghua University
  • Dehai Wu
    • Department of Mechanical EngineeringTsinghua University
    • College of EngineeringPeking University
Research Article

DOI: 10.1007/s12274-011-0154-5

Cite this article as:
Li, P., Wang, S., Jia, Y. et al. Nano Res. (2011) 4: 979. doi:10.1007/s12274-011-0154-5

Abstract

We report the fabrication of CuI-Si heterojunction solar cells with carbon nanotubes (CNTs) as a transparent electrode. A flexible CNT network was transferred onto the top of a polycrystalline CuI layer, making a conformal coating with good contact with the underlying CuI. The solar cells showed power conversion efficiencies in the range of 6% to 10.5%, while the efficiency degradation was less than 10% after the device was stored in air for 8 days. Compared with conventional rigid electrodes such as indium tin oxide (ITO) glass, the flexibility of the CNT films ensures better contact with the active layers and removes the need for press-contact electrodes. Degraded cells can recover their original performance by acid doping of the CNT electrode. Our results suggest that CNT films are suitable electrical contacts for rough materials and structures with an uneven surface.
https://static-content.springer.com/image/art%3A10.1007%2Fs12274-011-0154-5/MediaObjects/12274_2011_154_Fig1_HTML.gif

Keywords

Carbon nanotubesflexible electrodesheterojunction solar cells
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Supplementary material

12274_2011_154_MOESM1_ESM.pdf (219 kb)
Supplementary material, approximately 218 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2011