Chemical Treatment of Sn-Containing Transparent Conducting Oxides for the Enhanced Adhesion and Thermal Stability of Electroplated Metals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number2201617
Journal / PublicationAdvanced Materials Interfaces
Volume9
Issue number35
Online published26 Oct 2022
Publication statusPublished - 12 Dec 2022
Externally publishedYes

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Abstract

A surface treatment process, named ReTreat, is presented, and is shown to enhance the adhesion of electroplated metals on Sn-containing transparent conducting oxides (TCOs). The ReTreat process uses Zn powders, FeSO4 and glycine-buffered aqueous solutions (pH 3 to 5) in order to regulate a controlled and uniform conversion of SnO2 surfaces to SnO, Sn metal, and FexSny alloys. These surface metallic and intermetallic layers selectively enrich the electroplating of metallic films (including Ni, Au, and Ag). Subsequently, the process has been used to fabricate thermally stable metal films on rigid FTO-coated glass and flexible ITO-coated PET substrates. Standardized testing confirms that the metallic coatings exhibit sufficient adhesion to the underlying TCO with high thermal stability and tolerance to flexural strain. A reaction mechanism for the heterogenous surface treatment is deduced from X-ray diffraction, X-ray photoelectron spectroscopy, and in situ transmittance measurements. These investigations show how the process parameters (e.g., Zn powders, FeSO4 concentration, pH, and TCO type) impact the reaction rate, morphology, and composition of the treated TCO surface. This report provides detailed insights necessary for the future implementation of this innovative surface treatment, which has the prospect to be a customary process for electroplating onto Sn-containing TCOs. © 2022 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH.

Research Area(s)

  • adhesion promoters, electroplating, intermetallic layers, surface treatments, transparent conducting oxides

Citation Format(s)

Chemical Treatment of Sn-Containing Transparent Conducting Oxides for the Enhanced Adhesion and Thermal Stability of Electroplated Metals. / Ahmet, Ibbi Y.; Abdi, Fatwa F.; van de Krol, Roel.
In: Advanced Materials Interfaces, Vol. 9, No. 35, 2201617, 12.12.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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