Sivaranjani, Kumarsrinivasan and Agarkar, Shruti and Ogale, Satishchandra B. and Gopinath, Chinnakonda S. (2011) Toward a quantitative correlation between microstructure and DSSC efficiency: a case study of TiO2�xNx nanoparticles in a disordered mesoporous framework. Journal of Physical Chemistry C, 116 (3). pp. 2581-2587. ISSN 1932-7455

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Abstract

The efficiency (η) of a DSSC depends on various parameters, the critical factors being fast charge carrier transport and a slow rate of electron-hole recombination. The present report describes a simple combustion synthesis to prepare TiO2-xNx with following four important features that directly influences η: (1) A Disordered wormhole mesoporous structural framework with high surface area to give high dye-loading and a small diffusion length for charge carriers allowing rapid movement to the surface, (2) Electrically interconnected nanocrystalline TiO2-xNx with good necking and predominant (101) anatase facets to minimize electron-hole recombination, (3) Low charge storage capacity in the titania framework, and (4) Surface unsaturation assisting all the above factors. The Psuedo 3D nature of wormhole mesoporous TiO2-xNx with the above features demonstrates the importance of textural features and porosity allows faster diffusion of charge carriers to surface and their utilization to generate power. A quantitative correlation between interconnected nanoparticles over larger distances in a mesoporous framework and η is demonstrated. This study also demonstrates an inexpensive and rapid method of producing the photoanode material with high η in about 10 min.

Item Type: Article
Subjects: Catalysis and Surface Science
Materials Chemistry
Divisions: UNSPECIFIED
Depositing User: Mr Edwin Gnanakumar
Date Deposited: 24 Mar 2014 09:46
Last Modified: 09 Mar 2015 11:35
URI: http://ncl.csircentral.net/id/eprint/1369

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