Influence of ITO electrode surface composition on the growth and optoelectronic properties of electrodeposited Cu2O thin films

Anna Osherov; Changqiong Zhu; Matthew J. Panzer

doi:10.1021/jp409192p

Influence of ITO electrode surface composition on the growth and optoelectronic properties of electrodeposited Cu₂O thin films

Anna Osherov, Changqiong Zhu, Matthew J. Panzer

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Morphological inhomogeneity between electrodeposited cuprous oxide (Cu ₂O) thin films on nominally equivalent tin-doped indium oxide (ITO) electrodes under identical deposition conditions is reported. Dependence of the Cu₂O photocurrent generation ability on thin-film morphology is also described. Films exhibiting compact, polyhedral crystallites produce short circuit photocurrents more than 10 times greater than those consisting of sparse, dendritic crystallites. A correlation between the ITO surface stoichiometry and the resulting Cu₂O film morphology is established using X-ray photoelectron spectroscopy for identification of the ITO electrode surface chemical states. Variation in the Sn/In atomic ratio up to 33% is measured at the surfaces of ITO substrates from the same supplier lot, highlighting the importance of thorough electrode characterization prior to electrodeposition to obtain repeatable Cu₂O performance for energy conversion applications.

Original language	English
Pages (from-to)	24937-24942
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	117
Issue number	47
DOIs	https://doi.org/10.1021/jp409192p
State	Published - 27 Nov 2013
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp409192p

Cite this

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title = "Influence of ITO electrode surface composition on the growth and optoelectronic properties of electrodeposited Cu2O thin films",

abstract = "Morphological inhomogeneity between electrodeposited cuprous oxide (Cu 2O) thin films on nominally equivalent tin-doped indium oxide (ITO) electrodes under identical deposition conditions is reported. Dependence of the Cu2O photocurrent generation ability on thin-film morphology is also described. Films exhibiting compact, polyhedral crystallites produce short circuit photocurrents more than 10 times greater than those consisting of sparse, dendritic crystallites. A correlation between the ITO surface stoichiometry and the resulting Cu2O film morphology is established using X-ray photoelectron spectroscopy for identification of the ITO electrode surface chemical states. Variation in the Sn/In atomic ratio up to 33% is measured at the surfaces of ITO substrates from the same supplier lot, highlighting the importance of thorough electrode characterization prior to electrodeposition to obtain repeatable Cu2O performance for energy conversion applications.",

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AU - Panzer, Matthew J.

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AB - Morphological inhomogeneity between electrodeposited cuprous oxide (Cu 2O) thin films on nominally equivalent tin-doped indium oxide (ITO) electrodes under identical deposition conditions is reported. Dependence of the Cu2O photocurrent generation ability on thin-film morphology is also described. Films exhibiting compact, polyhedral crystallites produce short circuit photocurrents more than 10 times greater than those consisting of sparse, dendritic crystallites. A correlation between the ITO surface stoichiometry and the resulting Cu2O film morphology is established using X-ray photoelectron spectroscopy for identification of the ITO electrode surface chemical states. Variation in the Sn/In atomic ratio up to 33% is measured at the surfaces of ITO substrates from the same supplier lot, highlighting the importance of thorough electrode characterization prior to electrodeposition to obtain repeatable Cu2O performance for energy conversion applications.

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