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  Comparative study of hydrothermal treatment and thermal annealing effects on the properties of electrodeposited micro-columnar ZnO thin films

Lupan, O., Pauporte, T., Tiginyanu, I. M., Ursaki, V. V., Şontea, V. P., Ono, L. K., et al. (2011). Comparative study of hydrothermal treatment and thermal annealing effects on the properties of electrodeposited micro-columnar ZnO thin films. Thin Solid Films, 519(22), 7738-7749. doi:10.1016/j.tsf.2011.05.072.

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Lupan, Oleg1, 2, Author
Pauporte, Thierry1, Author
Tiginyanu, Ion M.3, Author
Ursaki, Veacheslav Vladimir 3, Author
Şontea, Victor P.2, Author
Ono, Luis K.4, Author
Roldan Cuenya, Beatriz4, Author           
Chow, Lee4, Author
1Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie (LECIME), UMR 7575 CNRS, Chimie ParisTech-ENSCP, 11 rue P. et M. Curie, 75231 Paris cedex 05, France, ou_persistent22              
2Department of Microelectronics and Semiconductor Devices, Technical University of Moldova, 168 Stefan cel Mare Blvd., Chisinau, MD-2004, Republic of Moldova, ou_persistent22              
3Institute of Electronic Engineering and Industrial Technologies, Institute of Applied Physics, Academy of Sciences of Moldova , 5, Academiei str, MD-2028, Chisinau, Republic of Moldova, ou_persistent22              
4Physics Department, University of Central Florida, ou_persistent22              


Free keywords: Zinc oxide, Thin films, Electrodeposition, Thermal annealing, Hydrothermal treatment, Photoluminescence, X-ray photoelectron spectroscopy, Raman spectroscopy
 Abstract: We report a comparison of the role played by different sample treatments, namely, a low-temperature hydrothermal treatment by hot H2O vapor in an autoclave versus thermal annealing in air on the properties of ZnO films grown by electrochemical deposition (ECD). Scanning electron microscopy studies reveal a homogeneous micro-columnar morphology and changes in the film surface for the two different treatments. It is found that post-growth hydrothermal treatments of ECD ZnO films at 150 °C under an aqueous environment enhance their structural and optical properties (photoluminescence, transmission, Raman spectra, etc.) similar to thermal annealing in air at higher temperatures (> 200 °C). The modifications of the structural and optical properties of ZnO samples after thermal annealing in air in the temperature range of 150–600 °C are discussed. The removal of chlorine from the films by the hydrothermal treatment was evidenced which could be the main reason for the improvement of the film quality. The observation of the enhanced photoluminescence peak at 380 nm demonstrates the superior properties of the hydrothermally treated ZnO films as compared to the films annealed in air ambient at the same or higher temperature. This post-growth hydrothermal treatment would be useful for the realization of high performance optoelectronic devices on flexible supports which might not withstand at high temperature annealing treatments.


Language(s): eng - English
 Dates: 2010-10-192011-05-282011-06-062011-09-01
 Publication Status: Issued
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.tsf.2011.05.072
 Degree: -



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Title: Thin Solid Films
  Abbreviation : Thin Solid Films
Source Genre: Journal
Publ. Info: Lausanne, Switzerland, etc. : Elsevier
Pages: 12 Volume / Issue: 519 (22) Sequence Number: - Start / End Page: 7738 - 7749 Identifier: ISSN: 0040-6090
CoNE: https://pure.mpg.de/cone/journals/resource/954925449792