Mobility-lifetime products in CuGaSe2

Balberg, I.; Albin, D.; Noufi, R.
March 1989
Applied Physics Letters;3/27/1989, Vol. 54 Issue 13, p1244
Academic Journal
We report the first accurate determination of mobility-lifetime products, μτ, in thin films of a Cu-ternary chalcopyrite by photoconductivity and ambipolar diffusion length measurements. We found that for Cu-deficient, nearly intrinsic CuGaSe2 at an illumination of about 0.25 AM1 the hole’s μτ is 6×10-6 cm2/V while the electron’s μτ is 2.6×10-9 cm2/V. The lifetime dependence on the light intensity was found to be characterized by the exponent γ-1=-0.44.


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