Time-evolution of poly(3-hexylthiophene) as an energy relay dye in dye-sensitized solar cells.
Energy relay dyes (ERD) and Förster 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.
Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, United Kingdom.
Nicola
N
Humphry-Baker
Kristina
K
Driscoll
Akshay
A
Rao
Tomas
T
Torres
Henry J
HJ
Snaith
Richard H
RH
Friend
D011211:Electric Power Supplies; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry*; D015394:Molecular Structure; D012993:Solar Energy; D013876:Thiophenes / Q000737:chemistry*; D013997:Time Factors
D005456:Fluorescent Dyes; D013876:Thiophenes; C507295:poly(3-hexylthiophene)