Abstract
A model for the band gap shrinkage in ternary chalcopyrite compounds is proposed and applied to CuInSe 2. A reasonable agreement is found with the data for both n- and p-type bulk samples of this compound. The fact that nearly the same energy gap is observed in p-type samples of CuInSe 2 while a wide range of E g is found for n-type CuInSe 2, is also explained by this model.
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