Photoinduced electron transfer in conjugated polymer/fullerene heterostructures

Andreas Haugeneder; C. Kallinger; Wolfgang Spirkl; Uli Lemmer; Jochen Feldmann; Ullrich Scherf; E. Harth; Andreas Guegel; Klaus Muellen

doi:10.1117/12.293355

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1 November 1997 Photoinduced electron transfer in conjugated polymer/fullerene heterostructures

Andreas Haugeneder, C. Kallinger, Wolfgang Spirkl, Uli Lemmer, Jochen Feldmann, Ullrich Scherf, E. Harth, Andreas Guegel, Klaus Muellen

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Proceedings Volume 3142, Fullerenes and Photonics IV; (1997) https://doi.org/10.1117/12.293355
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We investigate the photophysics in composite systems consisting of fullerene molecules and a conjugated polymer. Photoluminescence (PL) quenching experiments are used to study the photoinduced electron transfer that occurs after photoexcitation of the conjugated polymer In blend systems with various fullerene concentrations we find a strong concentration dependant PL-quenching. By doping a ladder type poly(p-phenylene) (LPPP) with 5 weight percent of a C₆₀-fullerene the polymer PL is quenched by more than one order of magnitude. Time-resolved measurements show that the photoinduced electron transfer can not be described by a single rate. The nonexponential PL-decay is due to complex processes in more detail we have prepared will define heterostructures comprising a self-assembled fullerene monolayer and a thin spin-coated polymer layer. From PL- quenching experiments on these samples we infer a value of 14 nm for the diffusion length of neutral excitations in LPPP.

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Andreas Haugeneder, C. Kallinger, Wolfgang Spirkl, Uli Lemmer, Jochen Feldmann, Ullrich Scherf, E. Harth, Andreas Guegel, and Klaus Muellen "Photoinduced electron transfer in conjugated polymer/fullerene heterostructures", Proc. SPIE 3142, Fullerenes and Photonics IV, (1 November 1997); https://doi.org/10.1117/12.293355

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