The use of nanostructured non-conventional semiconductors such as conjugated polymers and metal oxides (e.g. TiO2), opens promising perspectives towards a new generation of solar cells based on the concept of donor:acceptor bulk heterojunctions. In this concept donor material and acceptor material form interpenetrating networks allowing light absorption, charge transfer and charge transport throughout the entire bulk of the thin film. Since nanomorphology is of crucial importance for this type of solar cells, in this contribution the use of nanofibers in bulk heterojunction solar cells is explored in order to obtain highways for charge transport. We investigate in particular the use of P3AT (poly(3-alkylthiophene)) nanofibers and show that the polymer fraction aggregated into fibers can be easily controlled by temperature. We find an optimal efficiency at intermediate fiber fraction and show that it can be linked to the morphology of the active layer.
Poly(3-alkylthiophene) Nanofibers for Photovoltaic Energy Conversion / Bertho, S; Oosterbaan, W D; Vrindts, V; Bolsée, J C; Piersimoni, F; Spoltore, D; D'Haen, J; Lutsen, L; Vanderzande, D; Manca, J V. - 324:(2011), pp. 32-37. (Intervento presentato al convegno 1st Mediterranean Conference on Innovative Materials and Applications (CIMA 2011) tenutosi a Beirut at Crowne Plaza Hotel – Lebanon nel from March 15 to 17, 2011) [10.4028/www.scientific.net/AMR.324.32].
Poly(3-alkylthiophene) Nanofibers for Photovoltaic Energy Conversion
Spoltore D;
2011-01-01
Abstract
The use of nanostructured non-conventional semiconductors such as conjugated polymers and metal oxides (e.g. TiO2), opens promising perspectives towards a new generation of solar cells based on the concept of donor:acceptor bulk heterojunctions. In this concept donor material and acceptor material form interpenetrating networks allowing light absorption, charge transfer and charge transport throughout the entire bulk of the thin film. Since nanomorphology is of crucial importance for this type of solar cells, in this contribution the use of nanofibers in bulk heterojunction solar cells is explored in order to obtain highways for charge transport. We investigate in particular the use of P3AT (poly(3-alkylthiophene)) nanofibers and show that the polymer fraction aggregated into fibers can be easily controlled by temperature. We find an optimal efficiency at intermediate fiber fraction and show that it can be linked to the morphology of the active layer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
