TITLE

Bandgap tuning in highly c-axis oriented Zn1-xMgxO thin films

AUTHOR(S)
Kumar, Parmod; Malik, Hitendra K.; Ghosh, Anima; Thangavel, R.; Asokan, K.
PUB. DATE
June 2013
SOURCE
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p221903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We propose Mg doping in zinc oxide (ZnO) films for realizing wider optical bandgap in highly c-axis oriented Zn1-xMgxO (0 ≤ x ≤ 0.3) thin films. A remarkable enhancement of 25% in the bandgap by 30% Mg doping was achieved. The bandgap was tuned between 3.25 eV (ZnO) and 4.06 eV (Zn0.7Mg0.3O), which was further confirmed by density functional theory based wien2k simulation employing a combined generalized gradient approximation with scissor corrections. The change of stress and crystallite size in these films were found to be the causes for the observed blueshift in the bandgap.
ACCESSION #
88041273

 

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