Stille polycondensation

Liang et al. reported the synthesis of polymer Pj by Stille polycondensation between a dibromo compound and ditin compound. Pd(PPh3)4 was used as the catalyst, toluene and DMF (4 1) were used as the solvent, and the polymerization was carried out at 120 °C for 12 h under N2 protection. PTB7 was obtained with average molecular weight (M ) of 97.5 kDa and a PDI of 2.1. A PCE over 7% was obtained for BHJ PSCs based on PTB7. Later, the PCE was increased to 9.2% after device optimization (Scheme 1.2). ... 

Amb et at reported the synthesis of the first dithienogermole (DTG)-con-taining conjugated polymers by Stille polycondensation and their photovoltaic performance. When P rPCyoBM blends are utilized in inverted bulk heterojunction solar cells, the cells display a PCE of 7.3%. In inverted PSCs, when surface-modified ZnO-polymer nanocomposites were used as the electron-transporting layer, a PCE of 7.4% was achieved (Scheme 1.8). ... 

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