TITLE

Polarization of defect related optical transitions in chalcopyrites

AUTHOR(S)
Hönes, Katja; Eickenberg, Michael; Siebentritt, Susanne; Persson, Clas
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p092102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We investigate the symmetry of shallow acceptors in Cu chalcopyrites by polarization dependent photoluminescence measurements and density functional calculations. We determine the influence of the band symmetry versus the site symmetry. The polarization of the emitted or absorbed light is parallel to the c-axis in the case of CuGaSe2 and perpendicular to the c-axis in the case of CuInSe2. The symmetry of the defects depends in each case on the symmetry of the topmost band. Neither does the site symmetry affect the defect symmetry nor do the defects change the symmetry of the band.
ACCESSION #
34360692

 

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