Required Material Properties for High-Efficiency CIGS Modules

Ingrid Repins, Stephen Glynn, Joel Duenow, Timothy J. Coutts, Wyatt K. Metzger, Miguel A.contreras

Research output: Contribution to conferencePaperpeer-review

73 Scopus Citations

Abstract

Relatively high proven efficiencies of CIGS devices are often cited regarding its choice as a semiconductor for photovoltaic manufacturing. Module efficiency is an important parameter, as a number of factors in the cost per watt are driven downward by increasing efficiency. Some of these factors include materials costs, throughput for a given capital investment, and installation costs. Thus, realizing high-efficiency (e.g. 15%) large-area CIGS modules is key in both reducing cost per watt and differentiating the technology from other thin films. This paper discusses the material properties required of each layer of the CIGS device such that large-area CIGS modules can achieve efficiencies 15%, which is substantially higher than the current industrial state-of-the-art. The sensitivity of module performance to the important material parameters is quantified based on both experimental data and modeling. Necessary performance differences between small-area devices and large-area modules imposed by geometry are also quantified. Potential technical breakthroughs that may relax the requirements for each layer are discussed.

Original languageAmerican English
Number of pages14
DOIs
StatePublished - 2009
EventThin Film Solar Technology: SPIE Conference - San Diego, California
Duration: 2 Aug 20094 Aug 2009

Conference

ConferenceThin Film Solar Technology: SPIE Conference
CitySan Diego, California
Period2/08/094/08/09

NREL Publication Number

  • NREL/CP-520-47377

Keywords

  • Cigs
  • Material properties
  • Module
  • Photovoltaics

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