A comprehensive study of temperature-dependent reflectance and photoluminescence of Zn1-x Mnx O thin films grown on c -Al 2 O 3

D. Y. Lin, H. J. Lin, J. S. Wu, Wu-Ching Chou, C. S. Yang, J. S. Wang

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3 Scopus citations

Abstract

We present a systematic study of temperature-dependent reflectance (R) and photoluminescence (PL) measurements on ZnMnO films grown by plasma-assisted molecular beam epitaxy. For the first time, the three free-exciton transitions FXA (7c - 7v u), FXB (7c - 9v), and FXC (7c - 7v l) and the longitudinal-optical phonon replicas of FXB and FXC of ZnMnO films have been clearly observed in the R spectra. The parameters describing the activation energy and the temperature dependence of the transition energy and broadening have been extracted by fitting the experimental R and PL spectra. The spectral data of ZnMnO films not only show the deterioration of crystalline quality with increasing Mn composition fraction but also indicate the Mn clustering caused by Mn atom segregation.

Original languageEnglish
Article number053506
JournalJournal of Applied Physics
Volume105
Issue number5
DOIs
StatePublished - 24 Mar 2009

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