PV effect of fullerene/poly(3-hexylthiophene) blend sensitized by phthalocyanine having infrared absorption CT band

Autor:	Valdis Kampars, I. Kaulachs, P. Shipkovs, V. Parra, L. Gerca, Modris Roze, Māra Plotniece, Galina Kashkarova, Inta Muzikante, A. Murashov, J. Kalnachs, G. Shlihta
Předmět:	Spin coating Materials science business.industry Photochemistry Polymer solar cell chemistry.chemical_compound Photosensitivity PEDOT:PSS chemistry Absorption band Phthalocyanine Optoelectronics Quantum efficiency Charge carrier business
Zdroj:	Scopus-Elsevier Proceedings of ISES World Congress 2007 (Vol. I – Vol. V) ISBN: 9783540759966
Popis:	An attempt was made to extend the photosensitivity spectral range of fullerene/poly(3-hexylthiophene) blend to NIR region by adding extra electron donor — hydroxygallium phthalocyanine (GaOHPc) with a strong and wide intermolecular charge transfer (CT) band around 830 nm. Multilayer cells of ITO/PEDOT: PSS/6 GaOHPc/P3HT: C61(CO2Et)2 have been prepared by spin coating with vacuum evaporated Al or In top electrodes. Significant photosensitivity of the cells was in 370–900 nm spectral range. However charge carrier photogeneration efficiency was 3 times higher for illumination in P3HT absorption band as compared with the GaOHPc CT band at 830 nm. But when GaOHPc was mixed in the blend forming P3HT:C61(CO2Et)2:GaOHPc active layer its CT band shifted to infrared part at 875 nm. At the same time the charge carrier photogeneration efficiency for illumination in GaOHPc CT band increased significantly, exceeding its value for illumination in P3HT absorption band.
Databáze:	OpenAIRE
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