Abstract

CdTe films have been grown on (001) GaAs substrates by molecular beam epitaxy in a wide range of growth temperature. X-ray double crystal rocking curve has been used to analyze the quality and orientation of the epitaxial films. Our experiments prove that the growth temperature has a great effect on the quality and orientation of the epitaxial CdTe films: Tsub<300 °C, CdTe (111)∥GaAs (001); Tsub≳300 °C, CdTe (001)∥GaAs (001). An explanation is given for this result by considering the lattice mismatch and interface energy.

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