Effect of oxygen on the electronic band structure of II-O-VI alloys

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Author(s)

  • W. Shan
  • W. Walukiewicz
  • J. W. Ager III
  • J. Wu
  • J. Beeman
  • M. A. Scapulla
  • O. D. Dubon
  • E. E. Haller
  • Y. Nabetani
  • P. Becla

Detail(s)

Original languageEnglish
Pages (from-to)426-434
Journal / PublicationProceedings of SPIE - The International Society for Optical Engineering
Volume5349
Publication statusPublished - 2004
Externally publishedYes

Conference

TitlePhysics and Simulation of Optoelectronic Devices XII
PlaceUnited States
CitySan Jose, CA
Period26 - 29 January 2004

Abstract

We have studied the effects of composition and hydrostatic pressure on the direct optical transitions at the Γ point of the Brillouin zone in MBE-grown ZnOxSe1-x and ion-implantation-synthesized Zn1-yMnyOxTe1-x alloys. We observe a large O-induced band-gap reduction and a change in the pressure dependence of the fundamental band gap of the II-O-VI alloys. The effects are similar to those previously observed and extensively studied in highly mismatched III-N-V alloys. Our results are well explained in terms of the band anticrossing model that considers an anticrossing interaction between the highly localized oxygen states and the extended states of the conduction band of II-VI compounds. The O-induced modification of the conduction band structure offers an interesting possibility of using small amounts of O to engineer the optoelectronic properties of group II-O-VI alloys.

Research Area(s)

  • Band structure, Band-anticrossing, Highly mismatched alloys, Ii-vi compounds, Oxygen, Photovoltaic, Pressure effect, Zn1-yMnyO xTe1-x, ZnOxSe1-x

Citation Format(s)

Effect of oxygen on the electronic band structure of II-O-VI alloys. / Shan, W.; Walukiewicz, W.; Yu, K. M.; Ager III, J. W.; Wu, J.; Beeman, J.; Scapulla, M. A.; Dubon, O. D.; Haller, E. E.; Nabetani, Y.; Becla, P.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5349, 2004, p. 426-434.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal