Nano Research

, Volume 5, Issue 9, pp 595–604

Solution-processed bulk heterojunction solar cells based on interpenetrating CdS nanowires and carbon nanotubes

Authors

  • Zhen Li
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Jinquan Wei
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Peixu Li
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Luhui Zhang
    • Department of Materials Science and Engineering, College of EngineeringPeking University
  • Enzheng Shi
    • Department of Materials Science and Engineering, College of EngineeringPeking University
  • Chunyan Ji
    • Department of Materials Science and Engineering, College of EngineeringPeking University
  • Jiang Liu
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Daming Zhuang
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Zhendong Liu
    • State Key Laboratory of New Ceramics and Fine Processing and Department of Materials Science and EngineeringTsinghua University
  • Ji Zhou
    • State Key Laboratory of New Ceramics and Fine Processing and Department of Materials Science and EngineeringTsinghua University
  • Yuanyuan Shang
    • Centre for Composite Materials and StructuresHarbin Institute of Technology
  • Yibin Li
    • Centre for Composite Materials and StructuresHarbin Institute of Technology
  • Kunlin Wang
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Hongwei Zhu
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
  • Dehai Wu
    • Key Laboratory for Advanced Materials Processing Technology and Department of Mechanical EngineeringTsinghua University
    • Department of Materials Science and Engineering, College of EngineeringPeking University
Research Article

DOI: 10.1007/s12274-012-0245-y

Cite this article as:
Li, Z., Wei, J., Li, P. et al. Nano Res. (2012) 5: 595. doi:10.1007/s12274-012-0245-y

Abstract

Incorporation of a bulk heterojunction is an effective strategy to enhance charge separation and carrier transport in solar cells, and has been adopted in polymeric and colloidal nanoparticle solar cells to improve energy conversion efficiency. Here, we report bulk heterojunction solar cells based on one-dimensional structures, fabricated by mixing CdS nanowires (CdS NWs) and single-walled carbon nanotubes (CNTs) to form a composite film with mutually interpenetrating networks through a simple solution-filtration process. Within the composite, the CNT network boosts charge separation by extracting holes generated from CdS NWs and also forms the transport path for carrier collection by the external electrode. At an optimized CNT loading of about 5 wt.%, the CdS NW/CNT bulk heterojunction solar cells showed three orders of magnitude increase in photocurrent and cell efficiency compared to a cell with the same materials arranged in a stacked layer configuration with a plain heterojunction. External quantum efficiency and photoluminescence studies revealed the efficient charge transfer process from photoexcited CdS NWs to CNTs in the mixed form. Our results indicate that the bulk heterojunction structure strategy can be extended to semiconductor NWs and CNTs and can greatly improve solar cell performance.
https://static-content.springer.com/image/art%3A10.1007%2Fs12274-012-0245-y/MediaObjects/12274_2012_245_Fig1_HTML.gif

Keywords

Bulk heterojunctionsolar cellCdS nanowirecarbon nanotube

Supplementary material

12274_2012_245_MOESM1_ESM.pdf (307 kb)
Supplementary material, approximately 307 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012