TY  - JOUR
A1  - Roland, Steffen
A1  - Schubert, Marcel
A1  - Collins, Brian A.
A1  - Kurpiers, Jona
A1  - Chen, Zhihua
A1  - Facchetti, Antonio
A1  - Ade, Harald W.
A1  - Neher, Dieter
T1  - Fullerene-free polymer solar cells with highly reduced bimolecular recombination and field-independent charge carrier generation
T2  - The journal of physical chemistry letters
N2  - Photogeneration, recombination, and transport of free charge carriers in all-polymer bulk heterojunction solar cells incorporating poly(3-hexylthiophene) (P3HT) as donor and poly([N,N'-bis(2-octyldodecyl)-naphthelene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)) (P(NDI2OD-T2)) as acceptor polymer have been investigated by the use of time delayed collection field (TDCF) and time-of-flight (TOF) measurements. Depending on the preparation procedure used to dry the active layers, these solar cells comprise high fill factors (FFs) of up to 67%. A strongly reduced bimolecular recombination (BMR), as well as a field-independent free charge carrier generation are observed, features that are common to high performance fullerene-based solar cells. Resonant soft X-ray measurements (R-SoXS) and photoluminescence quenching experiments (PQE) reveal that the BMR is related to domain purity. Our results elucidate the similarities of this polymeric acceptor with the superior recombination properties of fullerene acceptors.
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37630
SN  - 1948-7185
VL  - 5
IS  - 16
SP  - 2815
EP  - 2822
PB  - American Chemical Society
CY  - Washington
ER  -