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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2753

Title: Photoactive blends of poly(para-phenylenevinylene) (PPV) with methanofullerenes from a novel precursor: Photophysics and device performance
Authors: Hummelen, JC
Brabec, CJ
Cravino, A
Zerza, G
Sariciftci, NS
Issue Date: 2001
Citation: JOURNAL OF PHYSICAL CHEMISTRY B, 105(8). p. 1528-1536
Abstract: Homogeneous blends of a processable methanofullerene, [6,6] phenyl C-61-butyric acid methyl ester (PCBM), with poly(para-phenylenevinylene) (PPV) synthesized using a novel nonionic precursor route were produced. These photoactive blends have been investigated by excited-state spectroscopy and by photocurrent measurements. UV-vis and IR absorption measurements, as well as luminescence spectroscopy, were used to monitor the conversion process of the precursor polymer to the PPV in blends with PCBM. The presence of PCBM did not influence the successful conversion process. The occurrence of photoinduced charge transfer, well-known for blends of substituted PPV with fullerenes, was evidenced in composites of PPV/PCBM by the strong quenching of the PPV luminescence. LESR (light induced electron spin resonance) and PIA (photoinduced absorption) studies confirmed the occurrence of photoinduced electron transfer from the PPV to PCBM within the bulk of solid state composite films. Photovoltaic devices made from PPV/PCBM blends showed power efficiencies of up to 0.25% under intense white light illumination. The spectral - photocurrent excitation profile was observed to follow closely the absorption spectrum of the PPV.
Notes: Johannes Kepler Univ, Christian Doppler Lab Plast Solar Cells, Inst Chem Phys Chem, A-4040 Linz, Austria. Inst Mat Res, Div Mat Phys, B-3590 Diepenbeek, Belgium. Inst Mat Res, Div Chem, B-3590 Diepenbeek, Belgium. Univ Groningen, Stratingh Inst, NL-9747 AG Groningen, Netherlands. Johannes Kepler Univ, Ctr Mat Sci, A-4040 Linz, Austria.Brabec, CJ, Johannes Kepler Univ, Christian Doppler Lab Plast Solar Cells, Inst Chem Phys Chem, A-4040 Linz, Austria.
URI: http://hdl.handle.net/1942/2753
DOI: 10.1021/jp003407z
ISI #: 000167267600005
ISSN: 1089-5647
Category: A1
Type: Journal Contribution
Validation: ecoom, 2002
Appears in Collections: Research publications

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