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Photoinduced interlayer electron transfer in alternating porphyrin–fullerene dyad and regioregular poly(3-hexylthiophene) Langmuir–Blodgett films

Paper ID Volume ID Publish Year Pages File Format Full-Text
29349 44158 2006 7 PDF Available
Title
Photoinduced interlayer electron transfer in alternating porphyrin–fullerene dyad and regioregular poly(3-hexylthiophene) Langmuir–Blodgett films
Abstract

Alternating Langmuir–Blodgett (LB) bi-layer structures containing a donor–acceptor (DA) dyad layer and a layer of conducting polymer were used to study interlayer vectorial photoinduced electron transfer (VPET). The used porphyrin–fullerene dyads were known to be capable of VPET, from the porphyrin to fullerene moiety, as a LB monolayer structure. The DA dyad and the poly(3-hexylthiophene), PHT, layers were deposited as adjacent LB monolayers in order to promote the secondary electron transfer from the polymer to the porphyrin cation, the product of the primary electron transfer. The VPET reaction was studied with the time-resolved Maxwell displacement charge (TRMDC) method both in the photovoltage (PV) and photocurrent (PC) modes. The PHT monolayer at the side of the porphyrin moieties lengthened the charge separation (CS) distance. Because of PHT the photovoltage amplitudes were increased and the recombination kinetics of the charge-separated state was delayed. The electron transfer direction in the bi-layer system was determined by the orientation of the DA dyad. The charge separation in the system took place with yield close to unity.

Keywords
Electron transfer; LB film; Porphyrin; Fullerene; Polythiophene
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Photoinduced interlayer electron transfer in alternating porphyrin–fullerene dyad and regioregular poly(3-hexylthiophene) Langmuir–Blodgett films
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 178, Issues 2–3, 20 March 2006, Pages 185–191
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us