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Issue 23, 2013
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Diacetylene bridged triphenylamines as hole transport materials for solid state dye sensitized solar cells

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Abstract

We have synthesized and characterized a series of triphenylamine-based hole-transport materials (HTMs), and studied their function in solid-state dye sensitized solar cells (ss-DSSCs). By increasing the electron-donating strength of functional groups (–H < –Me < –SMe < –OMe) we have systematically shifted the oxidation potential and ensuing photocurrent generation and open-circuit voltage of the solar cells. Correlating the electronic properties of the HTM to the device operation highlights a significant energy offset required between the Dye – HTM highest occupied molecular orbital (HOMO) energy levels. From this study, it is apparent that precise control and tuning of the oxidation potential is a necessity, and usually not achieved with most HTMs developed to date for ss-DSSCs. To significantly increase the efficiency of solid-state DSSCs understanding these properties, and implementing dye-HTM combinations to minimize the required HOMO offset is of central importance.

Graphical abstract: Diacetylene bridged triphenylamines as hole transport materials for solid state dye sensitized solar cells

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Article information


Submitted
09 Apr 2013
Accepted
30 Apr 2013
First published
01 May 2013

This article is Open Access

J. Mater. Chem. A, 2013,1, 6949-6960
Article type
Paper

Diacetylene bridged triphenylamines as hole transport materials for solid state dye sensitized solar cells

M. Planells, A. Abate, D. J. Hollman, S. D. Stranks, V. Bharti, J. Gaur, D. Mohanty, S. Chand, H. J. Snaith and N. Robertson, J. Mater. Chem. A, 2013, 1, 6949
DOI: 10.1039/C3TA11417A

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