Crystal growth of quaternary and pentanary chalcopyrite alloy single crystals for solar cell applications

Abstract

The growth of CuInSe 2(1-y)Te 2y, CuGaSe 2(1-y)Te 2y and CuIn 1−xGa xSe 2(1-y)Te 2y single crystals by chemical vapor transport technique in a closed tube, using iodine as a transport agent, is reported. Stringfellow's a-priori method is used in order to determine the interaction coefficients and the upper critical temperatures of pseudoternary chalcopyrite solid solutions. Resistivity and carrier mobility were determined by resistivity and Hall effect measurements using Van der Pauw method: all samples present p-type conductivity; the materials considered here have a large spread in the resistivity values.