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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4834

Title: Correlation between the morphology and photo-physical properties of P3HT: fullerene blends
Authors: Motaung, DE
Malgas, GF
Arendse, CJ
Keywords: Fullerene blends
Photo physical properties
Material science
Electron spin resonance (ESR)
Wide-angle X-ray scattering (WAXS)
P3HT luminescence
Issue Date: 2010
Publisher: Springer
Citation: Motaung, DE, Malgas, GF and Arendse, CJ. 2010. Correlation between the morphology and photo-physical properties of P3HT: fullerene blends. Journal of Materials Science, Vol. 45(12), pp 3276–3283
Series/Report no.: Journal Article;
Abstract: The photo-induced charge transfer and optoelectronic efficiency of the solar cells correlated to the morphology and the structure of P3HT:C60 blend was studied by means of photoluminescence and electron spin resonance (ESR). The occurrence of photo-induced charge transfer, well-known for blends of P3HT with fullerenes, was evidenced in blends of P3HT:C60 (1:1 wt ratio) by a strong partially quenching of the P3HT luminescence. The ESR measurements allowed one to quantify the charge transfer between P3HT and C60, which resulted in positive P3HT polarons. Wide-angle X-ray scattering (WAXS) and UV–vis spectroscopy showed that an inclusion of a C60 fullerene in the P3HT matrix lead to lower peak intensities and dark Debye rings and a blue shift on the p–p* interband transition of the P3HT as well as a reduction in the absorption coefficient. Selected area electron diffraction patterns of a well-ordered sample of P3HT exhibit distinct diffraction rings indicating that the P3HT forms a polycrystalline film. The large-scale phase separation of P3HT and C60 resulted from large C60 agglomerations during spin coating lead to a low power conversion efficiency of 0.2 9 10-4%.
Description: Copyright:2010 Springer. This is a pre print version of the work. The definitive version is published in Journal of Materials Science, Vol.45(12), pp 3276-3283
URI: http://www.springerlink.com/content/v3103035175201m1/fulltext.pdf
ISSN: 0022-2461
Appears in Collections:National Centre for nano-structured materials
CSIR ScienceScope
General science, engineering & technology

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