Journal
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Volume 26, Issue -, Pages 259-266Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2014.05.001
Keywords
Thin films; ZnO; Ca-dopant; Sol-gel; Band gap tuning and blue-luminescence
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Funding
- Department of Science and Technology, New Delhi [SR/S2/CMP-0028/2010]
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Four-fold enhancement in emission in the blue region is observed for the first time from sol-gel deposited calcium doped zinc oxide (Zn1-xCaxO) nanophosphor films having a hexagonal wurtzite structure. A 4.28% increase in the band gap has been obtained by introducing very small concentration (1.47 at%) of Ca dopant. A blue-shift of 55 meV in PL emission in UV region occurs with increase in dopant concentration. Optical transmission, FTIR spectra and surface structure of the films have been studied. Dopant concentration in the films is determined by EDX. (C) 2014 Elsevier Ltd. All rights reserved.
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