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Magneto-photoluminescence study of type-II charge confinement in epitaxially grown GaInP2

Research output: Contribution to journalJournal article

Published

<mark>Journal publication date</mark>03/2004
<mark>Journal</mark>Physica E: Low-dimensional Systems and Nanostructures
Issue2-4
Volume21
Number of pages4
Pages257-260
<mark>Original language</mark>English

Abstract

We have studied the photoluminescence from GaInP2 grown by molecular beam epitaxy as a function of laser power, magnetic field and temperature. We show that the single luminescence peak observed in such samples arises from weakly bound (type-II) excitons in which the electrons are localised and the holes are free, and that it is the same as the additional low-energy peak typically observed in strongly CuPt-ordered GaInP2 grown by chemical vapour deposition techniques. We propose that the electron is confined in In-rich regions of the sample and the hole is delocalised by coupling between heavy-and light-hole bands. (C) 2003 Elsevier B.V. All rights reserved.