Structural defects and photoluminescence studies of sol–gel prepared ZnO and Al-doped ZnO films

ZnO and Al-doped ZnO (AZO) films were synthesized using sol–gel spin-coating method. The powder XRD analysis revealed the stress relaxation mechanism upon Al doping in ZnO film. The reduction in the imaginary part of the dielectric constant and suppression of deep level acceptor type octahedral oxyg...

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Veröffentlicht in:Applied physics. A, Materials science & processing Materials science & processing, 2016-11, Vol.122 (11), p.1-9, Article 975
Hauptverfasser: Sandeep, K. M., Bhat, Shreesha, Dharmaprakash, S. M.
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creator Sandeep, K. M.
Bhat, Shreesha
Dharmaprakash, S. M.
description ZnO and Al-doped ZnO (AZO) films were synthesized using sol–gel spin-coating method. The powder XRD analysis revealed the stress relaxation mechanism upon Al doping in ZnO film. The reduction in the imaginary part of the dielectric constant and suppression of deep level acceptor type octahedral oxygen interstitial defects account for the reduction in carrier concentration in AZO with respect to ZnO. Electrical conductivity measurements and grain boundary conduction model are used to quantify the carrier concentration. From the Commission Internationale d’Eclairge diagram of ZnO and AZO, color parameters like dominant wavelength, color purity and luminosity are determined and reported for the first time. The prepared ZnO and AZO films show considerable blue emission. These films can be used for white light generation.
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subjects Applied physics
Azo
Carrier density
Characterization and Evaluation of Materials
Color
Condensed Matter Physics
Electrical resistivity
Grain boundaries
Machines
Manufacturing
Materials science
Nanotechnology
Optical and Electronic Materials
Photoluminescence
Physics
Physics and Astronomy
Processes
Reduction
Sol gel process
Sol-gel processes
Stress relaxation
Surfaces and Interfaces
Thin Films
White light
Zinc oxide
title Structural defects and photoluminescence studies of sol–gel prepared ZnO and Al-doped ZnO films
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