A-D-A-D-A-type oligothiophenes for vacuum-deposited organic solar cells.
Novel A-D-A-D-A-type oligothiophenes incorporating electron-withdrawing benzo[c][1,2,5]thiadiazole (BTDA) as core and trifluoroacetyl (TFA) as terminal acceptor groups have been developed. Vacuum-processed planar heterojunction organic solar cells incorporating these new oligomers as donor and C(60) as acceptor showed very high open circuit voltages up to 1.17 V, resulting in power conversion efficiencies of 1.56% under AM1.5G conditions.
Institute of Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
Simon
S
Steinberger
Amaresh
A
Mishra
Egon
E
Reinold
Christian M
CM
Müller
Christian
C
Uhrich
Martin
M
Pfeiffer
Peter
P
Bäuerle