TY - JOUR
T1 - Low bandgap polymers synthesized by FeCl(3) oxidative polymerization.
AU - Ci, Tianqi
AU - Zhou, Yi
AU - Wang, Ergang
AU - Hellstrom, Stefan
AU - Zhang, Fengling
AU - Xu, Shiai
AU - Inganas, Olle
AU - Andersson, Mats R.
PY - 2010/7
Y1 - 2010/7
N2 - Four low bandgap polymers, combining an alkyl thiophene donor with benzo[c][1,2,5]thiadiazole, 2,3-diphenylquinoxaline, 2,3-diphenylthieno[3,4-b]pyrazine and 6,7-diphenyl-[1,2,5]thiadiazolo[3,4-g]quinoxaline acceptors in a donor-acceptor-donor architecture, were synthesized via FeCl3 oxidative polymerization. The molecular weights of the polymers were improved by introducing o-dichlorobenzene (ODCB) as the reaction solvent instead of the commonly used solvent, chloroform. The photophysical, electrochemical and photovoltaic properties of the resulting polymers were investigated and compared. The optical bandgaps of the polymers vary between 1.0 and 1.9 eV, which is promising for solar cells. The devices spin-coated from an ODCB solution of P1DB:[70]PCBM showed a power conversion efficiency of 1.08% with an open-circuit voltage of 0.91 V and a short-circuit current density of 3.36 mA cm-2 under irradiation from an AM1.5G solar simulator (100 mW cm-2).
AB - Four low bandgap polymers, combining an alkyl thiophene donor with benzo[c][1,2,5]thiadiazole, 2,3-diphenylquinoxaline, 2,3-diphenylthieno[3,4-b]pyrazine and 6,7-diphenyl-[1,2,5]thiadiazolo[3,4-g]quinoxaline acceptors in a donor-acceptor-donor architecture, were synthesized via FeCl3 oxidative polymerization. The molecular weights of the polymers were improved by introducing o-dichlorobenzene (ODCB) as the reaction solvent instead of the commonly used solvent, chloroform. The photophysical, electrochemical and photovoltaic properties of the resulting polymers were investigated and compared. The optical bandgaps of the polymers vary between 1.0 and 1.9 eV, which is promising for solar cells. The devices spin-coated from an ODCB solution of P1DB:[70]PCBM showed a power conversion efficiency of 1.08% with an open-circuit voltage of 0.91 V and a short-circuit current density of 3.36 mA cm-2 under irradiation from an AM1.5G solar simulator (100 mW cm-2).
KW - Benzo[c][1,2,5]thiadiazole
KW - Bulk heterojunction
KW - FeCl oxidative polymerization
KW - Low bandgap polymers
KW - Polymer solar cells
UR - http://www.scopus.com/inward/record.url?scp=77953322891&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2010.03.024
DO - 10.1016/j.solmat.2010.03.024
M3 - Article
VL - 94
SP - 1275
EP - 1281
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
SN - 0927-0248
IS - 7
ER -