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Crystallinity of Solution Deposited TiO2 Films

Published online by Cambridge University Press:  15 February 2011

Gregory. K. L. Goh
Gregory. K. L. Goh*
Affiliation:
Institute of Materials Research and Engineering 3 Research Link, Singapore 117602, Singapore Email: [email protected]
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Abstract

Rutile and anatase TiO2 films were grown on glass substrates from acidic titanium precursor solutions from 60°C upwards. Anatase synthesized at 60°C had a crystallinity of 15% that increased to 54% for a growth temperature of 200°C. A similar crystallinity by conventional heat treatment of the 60°C material was attained only at 400°C. It is believed that more complete dehydration of titanium complexes at higher growth temperatures led to less disruption of the long range attractive forces required for the formation of the periodic crystalline lattice. Rutile films grown at 60°C were determined to have a refractive index of 2.4. This is lower than the bulk value of 2.65 because the as-synthesized rutile material was only 29% crystalline and also contained nano-sized pores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 878: Symposium Y – Solvothermal Synthesis and Processing of Materials , 2005 , Y5.4
Copyright
Copyright © Materials Research Society 2005

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