Title

An intermediate band dye-sensitised solar cell using triplet-triplet annihilation

RIS ID

103343

Publication Details

Simpson, C., Clarke, T. M., Macqueen, R. W., Cheng, Y. Yap., Trevitt, A. J., Mozer, A. J., Wagner, P., Schmidt, T. W. & Nattestad, A. (2015). An intermediate band dye-sensitised solar cell using triplet-triplet annihilation. Physical Chemistry Chemical Physics, 17 (38), 24826-24830.

Abstract

A new mechanism of charge photogeneration is demonstrated for the first time, based on organic molecular structures. This intermediate band approach, integrated into a dye-sensitised solar cell configuration is shown to generate charges upon illumination with low energy photons. Specifically 610 nm photoexcitation of Pt porphyrins, through a series of energy transfer steps and triplet-triplet annihilation, excites a higher energy absorption onset molecule, which is then capable of charge injection into TiO2. Transient absorption measurements reveal further detail of the processes involved.

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Link to publisher version (DOI)

http://dx.doi.org/10.1039/c5cp04825g