Molecular beam epitaxial growth of ZnCdTeO epilayers for intermediate band solar cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Tooru Tanaka
  • Yasuhiro Nagao
  • Tomohiro Mochinaga
  • Katsuhiko Saito
  • Qixin Guo
  • Mitsuhiro Nishio
  • Wladek Walukiewicz

Detail(s)

Original languageEnglish
Pages (from-to)259-262
Journal / PublicationJournal of Crystal Growth
Volume378
Publication statusPublished - 2013
Externally publishedYes

Abstract

We report the growth and characterization of the lattice-matched Zn 1-xCdxTe1yOy (ZnCdTeO) layers on ZnTe substrates by radio frequency plasma-assisted molecular beam epitaxy technique. The Cd composition increases linearly with increasing Cd/(Zn+Cd) flux ratio, indicating a controllability of Cd composition by Cd flux. Introduction of O radical during the growth of ZnCdTe resulted in the formation of ZnCdTeO layer. At particular O and Cd compositions lattice-matched ZnCdTeO epilayers on ZnTe substrate were obtained. Photoreflectance (PR) spectroscopy on the lattice-matched ZnCdTeO layer revealed two distinct PR features in the energy regions at 2.2-2.5 eV and 1.5-1.8 eV, which can be attributed to transitions from the valence band to the two conduction subbands, E+ and E-, respectively. © 2013 Elsevier B.V. All rights reserved.

Research Area(s)

  • Highly mismatched alloy, Intermediate band solar cells, Molecular beam epitaxy, Semiconducting II-VI materials

Citation Format(s)

Molecular beam epitaxial growth of ZnCdTeO epilayers for intermediate band solar cells. / Tanaka, Tooru; Nagao, Yasuhiro; Mochinaga, Tomohiro; Saito, Katsuhiko; Guo, Qixin; Nishio, Mitsuhiro; Yu, Kin M.; Walukiewicz, Wladek.

In: Journal of Crystal Growth, Vol. 378, 2013, p. 259-262.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review