Conductance switching in TiO2 nanorods is a redox-driven process: evidence from photovoltaic parameters

Ghosh, Batu ; Pal, Amlan J. (2009) Conductance switching in TiO2 nanorods is a redox-driven process: evidence from photovoltaic parameters Journal of Physical Chemistry, 113 (42). pp. 18391-18395. ISSN 0022-3654

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp908187a

Related URL: http://dx.doi.org/10.1021/jp908187a

Abstract

We study the effect of conductance switching of TiO2 nanorods on photovoltaic parameters. We fabricate devices with varied concentration of TiO2 nanorods in a poly(3-hexylthiophene) (P3HT) matrix with two electrodes. From the change in photovoltaic parameters upon switching, we have inferred that the conductance switching process of TiO2 nanorods is a redox-driven one. The electroreduction process changes the electronic energy levels of TiO2 that in turn modify the band diagram of P3HT:TiO2 devices. Under illumination, the open-circuit voltage of the device has hence become a parameter to probe the conducting state of TiO2 nanorods. We show that the open-circuit voltage can act as a probe parameter to evidence read-only and random-access memory applications.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:65800
Deposited On:19 Oct 2011 07:22
Last Modified:19 Oct 2011 07:22

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