Fabrication of solution processed 3D nanostructured CuInGaS2 thin film solar cells

Van Ben Chu, Jin Woo Cho, Se Jin Park, Yun Jeong Hwang, Hoo Keun Park, Young Rag Do, Byoung Koun Min

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this study we demonstrate the fabrication of CuInGaS2 (CIGS) thin film solar cells with a three-dimensional (3D) nanostructure based on indium tin oxide (ITO) nanorod films and precursor solutions (Cu, In and Ga nitrates in alcohol). To obtain solution processed 3D nanostructured CIGS thin film solar cells, two different precursor solutions were applied to complete gap filling in ITO nanorods and achieve the desirable absorber film thickness. Specifically, a coating of precursor solution without polymer binder material was first applied to fill the gap between ITO nanorods followed by deposition of the second precursor solution in the presence of a binder to generate an absorber film thickness of ∼1.3 μm. A solar cell device with a (Al, Ni)/AZO/i-ZnO/CdS/CIGS/ITO nanorod/glass structure was constructed using the CIGS film, and the highest power conversion efficiency was measured to be ∼6.3% at standard irradiation conditions, which was 22.5% higher than the planar type of CIGS solar cell on ITO substrate fabricated using the same precursor solutions.

Original languageEnglish
Article number125401
JournalNanotechnology
Volume25
Issue number12
DOIs
Publication statusPublished - 2014 Mar 28

Keywords

  • 3D nanostructure
  • CIGS
  • ITO nanorods
  • solar cells
  • solution process

ASJC Scopus subject areas

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

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  • Cite this

    Chu, V. B., Cho, J. W., Park, S. J., Hwang, Y. J., Park, H. K., Do, Y. R., & Min, B. K. (2014). Fabrication of solution processed 3D nanostructured CuInGaS2 thin film solar cells. Nanotechnology, 25(12), [125401]. https://doi.org/10.1088/0957-4484/25/12/125401