High quality CuInSe2 films grown on pseudo-lattice-matched substrates by molecular beam epitaxy

S. Niki, P. J. Fons, A. Yamada, T. Kurafuji, S. Chichibu, H. Nakanishi, W. G. Bi, C. W. Tu

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Abstract

CuInSe2 films have been grown by molecular beam epitaxy on pseudo-lattice-matched substrates that consist of a 1-μm-thick In0.29Ga0.71As layer grown on a linearly composition-graded InxGa1-xAs buffer (0≤x≤0.29) grown in turn on GaAs (001). The properties of these films have been compared with those of the films grown directly on GaAs (001). High resolution x-ray diffraction analysis on CuInSe2 grown on pseudo-lattice-matched substrates indicated substantial reduction on residual strain in the CuInSe2 films. A photoluminescence spectrum dominated by sharp free exciton emissions has been observed for the first time from CuInSe2 films indicative of significant improvement in crystalline quality and substantial reduction in the point defect density.

Original languageEnglish
Pages (from-to)647-649
Number of pages3
JournalApplied Physics Letters
Volume69
Issue number5
DOIs
Publication statusPublished - 1996 Jul 29
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Niki, S., Fons, P. J., Yamada, A., Kurafuji, T., Chichibu, S., Nakanishi, H., Bi, W. G., & Tu, C. W. (1996). High quality CuInSe2 films grown on pseudo-lattice-matched substrates by molecular beam epitaxy. Applied Physics Letters, 69(5), 647-649. https://doi.org/10.1063/1.117793