Spray-dried and pre-sintered TiO2 micro-balls for sinter-free processing of dye-sensitized solar cells

Seung I. Cha; Bo K. Koo; Kyu Hyeon Hwang; Seon Hee Seo; Dong Yoon Lee

doi:10.1039/C0JM04450D

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Spray-dried and pre-sintered TiO₂ micro-balls for sinter-free processing of dye-sensitized solar cells†

Seung I. Cha,*^a Bo K. Koo,^a Kyu Hyeon Hwang,^a Seon Hee Seo^a and Dong Yoon Lee^a

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* Corresponding authors

^a Nanohybrid & Energy Materials Research Center, Korea Electrotechnology Research Institute, Boolmosan-gil 70, Changwon, Korea
E-mail: sicha@keri.re.kr
Tel: +82-55-280-1649

Abstract

A sinter-free TiO₂ electrode for flexible DSSCs was fabricated by utilizing spherical aggregates of pre-sintered TiO₂ nanoparticles 2–5 μm in diameter (micro-balls), which are prepared by a spray-drying process. The network of interconnected TiO₂ nanoparticles within the pre-sintered TiO₂ micro-balls resulted in an electron diffusion path from adsorbed dye to an underlying TCO surface, while the nanoparticles themselves made a porous, high surface area TiO₂ structure, hence improved energy conversion efficiency.

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Article information

DOI: https://doi.org/10.1039/C0JM04450D
Article type: Paper
Submitted: 20 Dec 2010
Accepted: 18 Feb 2011
First published: 15 Mar 2011

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J. Mater. Chem., 2011,21, 6300-6304

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Spray-dried and pre-sintered TiO₂ micro-balls for sinter-free processing of dye-sensitized solar cells

S. I. Cha, B. K. Koo, K. H. Hwang, S. H. Seo and D. Y. Lee, J. Mater. Chem., 2011, 21, 6300 DOI: 10.1039/C0JM04450D

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Journal of Materials Chemistry