High purity CuInSe2 heteroepitaxial layers were successfully grown by low-pressure metalorganic vapor phase epitaxy. A certain amount of excitonic absorption was found in the optical absorption spectra even at room temperature (RT). A predominant near-band-edge photoluminescence peak was observed at RT for the first time from a (001) oriented epilayer grown on a GaAs(001) substrate. The epilayers were grown in order to carry out a systematic investigation of intrinsic defects and intentional dopants in the matrix.
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Shigefusa F. Chichibu (1997) studied this question.
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