Role of photoactive layer morphology in high fill factor all-polymer bulk heterojunction solar cells

We report on the realization of all-polymer solar cells based on blends of poly(3-hexylthiophene-2,5-diyl) (P3HT) as a donor and poly{[N,N[prime or minute]-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide) - 2,6-diyl]-alt-5,5[prime or minute]-(2,2[prime or minute]-bithiophene)} (P(NDI2OD-T2...

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Bibliographic Details
Published in:Journal of materials chemistry 2011-01, Vol.21 (16), p.5891-5896
Main Authors: Fabiano, S., Chen, Z., Vahedi, S., Facchetti, A., Pignataro, B., Loi, M. A.
Format: Article
Language:English
Subjects:
Balancing
Blends
Constraining
Devices
Heterojunctions
Photovoltaic cells
Solar cells
Thin films
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Summary:We report on the realization of all-polymer solar cells based on blends of poly(3-hexylthiophene-2,5-diyl) (P3HT) as a donor and poly{[N,N[prime or minute]-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide) - 2,6-diyl]-alt-5,5[prime or minute]-(2,2[prime or minute]-bithiophene)} (P(NDI2OD-T2)) as an acceptor. High fill factors are demonstrated for the first time in this class of devices suggesting high dissociation efficiency for the bounded electron-hole pairs and balanced electron and hole mobility along the thin films. The use of the high-mobility n-type P(NDI2OD-T2) polymer enables us to overcome one of the problems limiting the efficiency of all-polymer solar cells, resulting in fill factors comparable with those reported for fullerene-based devices.
ISSN:0959-9428
1364-5501
DOI:10.1039/c0jm03405c