Molecular design and morphology control towards efficient polymer solar cells processed using non-aromatic and
Yu Chen1, Shaoqing Zhang, Yue Wu
1State 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.
Abstract:
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.


