Journal
NANO LETTERS
Volume 12, Issue 2, Pages 634-639Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl203377r
Keywords
Dye-sensitized solar cell; solid-state; FRET; transient absorption spectroscopy
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Funding
- EPSRC
- MICINN (Spain) [CTQ2011-24187/BQU, PLE2009-0070, CSD2007-00010]
- Comunidad de Madrid [MADRISOLAR-2, S2009/PPQ/1533]
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Energy relay dyes (ERD) and Forster resonant energy transfer (FRET) are useful techniques for increasing absorption in dye-sensitized solar cells. We use femtosecond transient absorption spectroscopy to monitor charge generation processes in a solid-state DSC containing poly(3-hexylthiophene) (P3HT) as both the hole-transporter and the ERD with a zinc phthalocyanine dye (TT1) as the sensitizer. We observe efficient FRET occurring on picosecond time scales and subsequent hole transfer from TT1 to P3HT occurring onward from 100 ps.
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