TITLE

Blueshift in optical band gap in nanocrystalline Zn1-xCaxO films deposited by sol-gel method

AUTHOR(S)
Misra, Kamakhya Prakash; Shukla, R. K.; Srivastava, Atul; Srivastava, Anchal
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p031901
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A blueshift in the optical band gap of nanocrystalline Zn1-xCaxO thin films has been obtained. A 12.72% enhancement in the band gap of ZnO thin films has been obtained using Ca dopant for the first time. The band gap widens from 3.38 to 3.81 eV as the Ca concentration increases from x=0 to x=0.15. The films are deposited by sol-gel method and have a hexagonal wurtzite phase with no indication of calcium. Grain size lies in the range of 12–92 nm. Atomic force micrographs indicate much smaller rms surface roughness showing significantly smooth surfaces.
ACCESSION #
43398086

 

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