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Current Transport Mechanisms in CuIn1−xGaxSe2 and CIS Thin-Film Solar Cells on Flexible Stainless Steel Substrates

  • Gaurav A. Naik (a1) and Wayne A. Anderson (a1)

Abstract

Copper indium gallium selenide (CIGS) solar cells on thin film stainless steel substrates were evaluated by current-voltage-temperature (IVT) from 150K-350K to determine current transport mechanisms. Both dark and photo data at reverse and low forward voltages exhibited tunneling-like behavior. At intermediate forward voltages, diffusion or thermionic emission are suggested by an ideality factor close to 1.0. At higher currents and voltages there is a trend towards recombination or space change limited behavior.

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