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Influence of spray-pyrolysis deposition parameters on the electrical properties of aluminium zinc oxides thin films

Published online by Cambridge University Press:  30 January 2018

Denis E. Martins ,
Giovani Gozzi  and
Lucas Fugikawa Santos
Denis E. Martins
Affiliation:
Departamento de Física, Universidade Estadual Paulista - UNESP, Avenida 24A, 1515, CEP: 13500-970,Rio Claro, SP, Brazil.
Giovani Gozzi*
Affiliation:
Departamento de Física, Universidade Estadual Paulista - UNESP, Avenida 24A, 1515, CEP: 13500-970,Rio Claro, SP, Brazil.
Lucas Fugikawa Santos
Affiliation:
Departamento de Física, Universidade Estadual Paulista - UNESP, Avenida 24A, 1515, CEP: 13500-970,Rio Claro, SP, Brazil. Departamento de Física, Universidade Estadual Paulista - UNESP, Rua Cristovao Colombo 2265, CEP15054-000, São José do Rio Preto, SP, Brazil.
*
*(Email: [email protected])
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Abstract

In the current work, we evaluate the influence of the processing parameters on the electrical properties of aluminium zinc oxide (AZO) thin films produced by airbrush spray-pyrolysis deposition technique. Spray-deposited AZO thin-films were produced with Al:Zn molar ratios varying from 0 % (pure ZnO) up to 30 %, using aluminium acetate and zinc acetate as organic precursors and water as solvent. Thermogravimetric analysis (TGA) and infrared spectroscopy (FTIR-ATR) were used to monitor the metal-oxide formation from the organic precursors as a function of the temperature. The results show that a temperature of 400 °C is necessary to completely degrade the organic phase and to obtain the desired inorganic metal-oxides films. The electrical properties of the TMOs were evaluated by d.c. current-voltage (I-V) analysis using planar thermally evaporated Al electrodes on top of the TMO layer, with different aspect ratios (1/18, 2/9, 5/13, 5/9 and 8/9). The lowest sheet resistance was obtained for AZO films at a molar Al concentration of 5 %. We also observed that, after carrying out a post-annealing treatment (30 mbar, 150 °C) the samples presented a decrease on the sheet resistance superior to 60 %, in comparison to the samples before the treatment.

Keywords

oxidethin filmspray pyrolysis
Type
Articles
Information
MRS Advances , Volume 3 , Issue 5: Electronics, Magnetics and Photonics , 2018 , pp. 283 - 289
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Copyright
Copyright © Materials Research Society 2018 

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References

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