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

Authors

Catherine Simpson, University of WollongongFollow
Tracey M. Clarke, University of WollongongFollow
Rowan W. Macqueen, University of New South Wales
Yuen Yap Cheng, University of New South Wales
Adam J. Trevitt, University of WollongongFollow
Attila J. Mozer, University of WollongongFollow
Pawel W. Wagner, University of WollongongFollow
Timothy W. Schmidt, University of New South WalesFollow
Andrew Nattestad, University of WollongongFollow

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.