Germaindacenodithiophene based low band gap polymers for organic solar cells.
We report the first synthesis of a fused germaindacenodithiophene monomer and its polymerisation with 2,1,3-benzothiadiazole by Suzuki polycondensation. The resulting polymer, PGeTPTBT, is semicrystalline, despite the presence of four bulky 2-ethylhexyl groups. Blends with P(70)CBM afford solar cells with efficiencies of 5.02%.
Dept. Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
Zhuping
Z
Fei
Raja Shahid
RS
Ashraf
Zhenggang
Z
Huang
Jeremy
J
Smith
R Joseph
RJ
Kline
Pasquale
P
D'Angelo
Thomas D
TD
Anthopoulos
James R
JR
Durrant
Iain
I
McCulloch
Martin
M
Heeney