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Issue 7, 2019
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Ethanolamine-assisted low-temperature crystallization of hydroxide nanoparticle ink into transparent and conductive ITO layers

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Abstract

Low-temperature crystallization is desired for achieving solution processable transparent conductive oxide (TCO) layers. Here we demonstrate a low-temperature crystallization of tin doped indium oxide (ITO) layers by taking preformed indium-tin hydroxide nanoparticles as the precursor and applying surface modification with ethanolamine on the as-prepared layers. Surface modification with ethanolamine is shown to speed up the dehydration of the hydroxide precursor, resulting in earlier onset of crystallization into the cubic bixbyite ITO phase with a larger crystal size. The ethanolamine-modified ITO nanoparticle layer possesses fewer surface hydroxyl groups as compared to the non-treated layer, corresponding to a higher charge carrier concentration, as manifested in a near IR absorption. The nanoparticle ITO layer shows dc conductivity two times higher than that of the non-treated layer. A conductivity of 43 S cm−1 combined with a high optical transmittance of above 90% in the 380–1100 nm wavelength range is obtained for the nanoparticle ITO layer annealed at 300 °C.

Graphical abstract: Ethanolamine-assisted low-temperature crystallization of hydroxide nanoparticle ink into transparent and conductive ITO layers

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Article information


Submitted
13 Oct 2018
Accepted
18 Dec 2018
First published
24 Jan 2019

This article is Open Access

J. Mater. Chem. A, 2019,7, 3083-3089
Article type
Paper

Ethanolamine-assisted low-temperature crystallization of hydroxide nanoparticle ink into transparent and conductive ITO layers

Y. Liu, T. Moser, C. Andres, L. Gorjan, A. Remhof, F. Clemens, T. Graule, A. N. Tiwari and Y. E. Romanyuk, J. Mater. Chem. A, 2019, 7, 3083
DOI: 10.1039/C8TA09891C

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