Blueshift in optical band gap in nanocrystalline Zn1−xCaxO films deposited by sol-gel method
- 20 July 2009
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 95 (3)
- https://doi.org/10.1063/1.3184789
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.This publication has 23 references indexed in Scilit:
- Bead structured nanocrystalline ZnO thin films: Synthesis and LPG sensing propertiesApplied Surface Science, 2008
- Effect of toxic gases on humidity sensing property of nanocrystalline ZnO filmJournal of Applied Physics, 2007
- Rational synthesis and tunable optical properties of quasialigned Zn1−xMgxO nanorodsApplied Physics Letters, 2007
- Growth of transparent conducting nanocrystalline Al doped ZnO thin films by pulsed laser depositionJournal of Crystal Growth, 2006
- Sol-gel synthesis and nonlinear optical transmission in Zn(1−x)Mg(x)O (x⩽0.2) thin filmsApplied Physics Letters, 2006
- Mg x Zn 1 − x O ( 0 ⩽ x < 0.2 ) nanowire arrays on sapphire grown by high-pressure pulsed-laser depositionApplied Physics Letters, 2005
- Structural properties and bandgap bowing of ZnO1−xSx thin films deposited by reactive sputteringApplied Physics Letters, 2004
- Evaluation of the discrete energy levels of individual ZnO nanorodsingle-quantum-well structures using near-field ultraviolet photoluminescence spectroscopyApplied Physics Letters, 2004
- Fabrication and characterization of n-ZnO/p-AlGaN heterojunction light-emitting diodes on 6H-SiC substratesApplied Physics Letters, 2003
- Transparent conducting aluminum-doped zinc oxide thin films for organic light-emitting devicesApplied Physics Letters, 2000