Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
Volume 120, Issue -, Pages 1-9Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2013.01.003
Keywords
Li:ZnO; Structural; Optoelectronic; Mobility; TNT degradation
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Funding
- Defense Research and Development Organization (DRDO), New Delhi [ERIP/ER/0503504/M/01/1007]
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Li-doped ZnO thin films with preferred (002) orientation have been prepared by spray pyrolysis technique in aqueous medium on to the corning glass substrates. The effect of Li-doping on to the photoelectrochemical, structural, morphological, optical, luminescence, electrical and thermal properties has been investigated. XRD and Raman study indicates that the films have hexagonal crystal structure. The transmittance, reflectance, refractive index, extinction coefficient and bandgap have been analyzed by optical study. PL spectra consist of a near band edge and visible emission due to the electronic defects, which are related to deep level emissions, such as oxide antisite (O-zn), interstitial zinc (Zn-i), interstitial oxygen (O-i) and zinc vacancy (V-zn). The Li-doped ZnO films prepared for 1 at% doping possesses the highest electron mobility of 102 cm(3)/Vs and carrier concentration of 3.62 x 10(19) cm(-3). Finally, degradation of 2,4,6-Trinitrotoluene using Li-doped ZnO thin films has been reported. (C) 2013 Elsevier B.V. All rights reserved.
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