http://www.cnr.it/ontology/cnr/individuo/prodotto/ID232838

Effect of blend composition in BisEH-PFDTBT:PC70BM solar cells (Articolo in rivista)

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Label

Effect of blend composition in BisEH-PFDTBT:PC70BM solar cells (Articolo in rivista) (literal)

Anno

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Alternative label

Calabrese, A; Pellegrino, A; Po, R; Savoini, A; Tinti, F; Camaioni, N (2011)
Effect of blend composition in BisEH-PFDTBT:PC70BM solar cells
in Solar energy materials and solar cells; ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
(literal)

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Titolo

Abstract

The photovoltaic properties of bulk-heterojunction solar cells with an active layer made of an alternating fluorene copolymer, poly{[2,7-(9,9-bis-(2-ethylhexyl)-fluorene)]-alt-[5,5-(4,7-di-2'-thienyl-2,1,3-benzothiadiazole)]}, and [6,6]-phenyl-C-71-butyric acid methylester are investigated by varying the blend composition and the incident light power intensity. An efficient donor-acceptor intermixing is reached with donor to acceptor weight ratios of at least 1:3, while at lower acceptor content charge trapping effects are evidenced by the light intensity dependent study. Reverse bias analysis demonstrates that a major limiting factor for the performance of the investigated solar cells is represented by the poor ability of the generation of free charge carriers, attributed to the low hole mobility in the polymer phase. (literal)

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