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Journal of Materials Science
Published in: Journal of Materials Science 24/2015

01-12-2015 | Original Paper

An approach for determining chemical composition of zinc oxide films with carbon-containing contamination at the surface

Authors: G. G. Untila, T. N. Kost, A. B. Chebotareva, A. N. Ryabinkin, M. A. Timofeyev

Published in: Journal of Materials Science | Issue 24/2015

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Abstract

Reliable determination of the elemental composition of the ZnO-based films is complicated by the fact that as a result of interaction with the environment, surface of the films is quickly covered by a large number of carbon-containing CO x contaminations. In this paper, we propose two methods for analyzing the results of the measurements of the elemental composition, allowing to determine the composition of the film and of contamination. These methods are based on deposition and analysis of several (at least two) films grown under the same conditions, which differ only in film thickness. Both methods were applied for processing the elemental composition obtained by EDS for ten pairs of Ga-doped ZnO (GZO) films grown by ultrasonic spray pyrolysis on silicon substrate. In each pair, one GZO film was thinner than the other thicker one. The pairs of films differed from one another by the Ga/Zn ratio in the film-forming solution, used for the synthesis of films GZO, which varied in the range 0–15 at.%. The composition of the contamination at the surface was found to be CO0.925. Concentration of oxygen in GZO is 41.7 ± 1 at.%, O/(Ga + Zn) ratio is around 0.72 ± 0.03. Crystalline silicon solar cells based on GZO/(p+nn+)c-Si structure with spray-deposited GZO films as an antireflection coating and transparent electrode showed the efficiency of 15.7 % at one sun conditions.
previous article Synthesis of reduced graphene oxide–copper tin sulphide composites and their photoconductivity enhancement for photovoltaic applications
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Metadata
Title
An approach for determining chemical composition of zinc oxide films with carbon-containing contamination at the surface
Authors
G. G. Untila
T. N. Kost
A. B. Chebotareva
A. N. Ryabinkin
M. A. Timofeyev
Publication date
01-12-2015
Publisher
Springer US
Published in
Journal of Materials Science / Issue 24/2015
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-015-9371-8

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