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Correlation of Raman and X-Ray Diffraction Measurements of Annealed Pulsed Laser Deposited ZnO Thin Films.

Roy, C. and Byrne, Sarah and McGlynn, Enda and Mosnier, Jean-Paul and de Posada, Eduardo and O'Mahony, Donagh and Lunney, James G. and Henry, Martin O. and Ryan, Brendan and Cafolla, Attilio A. (2003) Correlation of Raman and X-Ray Diffraction Measurements of Annealed Pulsed Laser Deposited ZnO Thin Films. Thin Solid Films, 436 (2). pp. 273-276. ISSN 0040-6090

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Abstract

Raman spectroscopy, X-ray diffractometry and atomic force microscopy have been used to characterise ZnO thin films grown by pulsed laser deposition as a function of the post-growth annealing temperature. The results show substantial enhancement and broadening of certain Raman features which correlate excellently with the change in width of the X-ray diffraction peaks. The 570 cm[-1] Raman feature showed pronounced asymmetry and enhanced intensity in the unannealed sample. An increase in grain size observed after subsequent annealing produced a substantial reduction in both the asymmetry and intensity of this peak. Our experimental data suggest that electric fields, due to charge trapping at grain boundaries, in conjunction with localised and surface phonon modes are the cause of the intensity enhancement and asymmetry of this feature.

Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:transition element compounds; inorganic compounds; line broadening; raman spectra; texture; microstructure; polycrystals; thermal annealing; pulsed lasers; laser ablation technique; crystal growth from vapors; zinc oxides; II-VI semiconductors; wide band gap semiconductors; thin films; experimental study;
Subjects:Physical Sciences > Thin films
Physical Sciences > Physics
Physical Sciences > Lasers
Physical Sciences > Semiconductors
DCU Faculties and Centres:Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:Elsevier
Official URL:http://dx.doi.org/10.1016/S0040-6090(03)00617-5
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:6
Deposited On:26 Oct 2006 by DORAS Administrator. Last Modified 29 Jan 2009 16:14

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