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Insights into nucleation, growth and phase selection of WO3: morphology control and electrochromic properties

Ghosh, Kanad and Roy, Ahin and Tripathi, Shalini and Ghule, Siddharth and Singh, Abhishek K and Ravishankar, N (2017) Insights into nucleation, growth and phase selection of WO3: morphology control and electrochromic properties. In: JOURNAL OF MATERIALS CHEMISTRY C, 5 (29). pp. 7307-7316.

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Official URL: http://doi.org/10.1039/c7tc01714f

Abstract

Electrochromic application of nanoscale WO3 demands stringent control in terms of phase-purity and morphology. Here, we show that two different phases of WO3 with distinct morphologies ( viz. 2D plates of orthorhombic phase and 1D rods of hexagonal phase) can be obtained by tuning the solvothermal reaction conditions. Control experiments along with density functional theory based ab initio calculations show that the reaction pathway critically depends on the capping agent used in the reaction. Using this concept in conjunction with crystallographic arguments, we rationalize the morphology evolution of the two phases. Furthermore, the synthesized phases exhibit very different electrochromic properties in terms of H+ diffusion, which can be rationalized by the calculated trend in the H+-intercalation energies.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 24 Aug 2017 05:16
Last Modified: 24 Aug 2017 05:16
URI: http://eprints.iisc.ac.in/id/eprint/57662

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