Issue 13, 2013

Formation of a crystalline nanotube–nanoparticle hybrid by post water-treatment of a thin amorphous TiO2 layer on a TiO2nanotube array as an efficient photoanode in dye-sensitized solar cells

Abstract

An atomic layer deposited, conformal thin layer (∼15 nm) of amorphous TiO2 on a primary TiO2 NT array is effectively converted into partly crystalline nanoparticles on the inside walls of TiO2 nanotubes by water mediated dissolution–precipitation phenomena without disturbing the original state of the TNTAs. This method helps to achieve the exclusive conversion of the secondary shell of amorphous TiO2 layer coated by ALD into nanoparticles and the preservation of original crystalline nanotube (core) properties such as mechanical stability and the charge transport properties. As a consequence, the resultant core–shell type nanotubenanoparticle composite showed higher photoanode performance (25% increment in efficiency) than conventional untreated TiO2 NT array photoanode.

Graphical abstract: Formation of a crystalline nanotube–nanoparticle hybrid by post water-treatment of a thin amorphous TiO2 layer on a TiO2 nanotube array as an efficient photoanode in dye-sensitized solar cells

Supplementary files

Article information

Article type
Paper
Submitted
03 Dec 2012
Accepted
18 Jan 2013
First published
18 Jan 2013

J. Mater. Chem. A, 2013,1, 4370-4375

Formation of a crystalline nanotubenanoparticle hybrid by post water-treatment of a thin amorphous TiO2 layer on a TiO2 nanotube array as an efficient photoanode in dye-sensitized solar cells

S. Kurian, P. Sudhagar, J. Lee, D. Song, W. Cho, S. Lee, Y. S. Kang and H. Jeon, J. Mater. Chem. A, 2013, 1, 4370 DOI: 10.1039/C3TA01339A

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