Molecular design and morphology control towards efficient polymer solar cells processed using non-aromatic and non-chlorinated solvents.
Using an environmentally friendly solvent, N-methyl-2-pyrrolidone, a polymer with benzodithiophene (BDT) and thieno[3,4-b]thiophene (TT) monomers and triethylene glycol monoether (TEG) side chains, PBDTTT-TEG, can be processed into an active layer for a polymer solar cell (PSC). Combined with phenyl-C 71-butyric acid methyl ester (PC 71 BM) as the acceptor, the resulting PSC has a power conversion efficiency (PCE) of 5.23%. This is the first example of an efficient polymer solar cell fabricated from a non-aromatic and nonchlorinated solvent.
State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China; Graduate University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Yu
Y
Chen
Shaoqing
S
Zhang
Yue
Y
Wu
Jianhui
J
Hou
conjugated polymers; morphology; polymer solar cells; processing solvents