کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
78399 | 49330 | 2012 | 7 صفحه PDF | دانلود رایگان |
A new D-A conjugated polymer containing a benzo[1,2-b:4,5-b′]dithiophene donor unit and bisthienyl-s-tetrazine acceptor unit, PBDT-TTz, was synthesized by Stille cross-coupling polymerization and was characterized by 1H NMR, elemental analysis and GPC. The copolymer shows good thermal stability with decomposition temperature of 276 °C and broad absorption band from 350 to 700 nm. Cyclic voltammetric measurement shows that the HOMO energy level of the copolymer is deep-lying (−5.42 eV), which implies that the copolymer has good stability in the air and assures a higher open circuit potential when it is applied in photovoltaic cells. Bulk-heterojunction polymer solar cells were fabricated using PBDT-TTz blended PC71BM as the active layer. The power conversion efficiency of the PSC is 3.32% under 100 mW/cm2 AM 1.5 illumination, indicating that PBDT-TTz is a potential candidate for polymer solar cells.
► We have synthesized a new D-A conjugated copolymer PBDT-TTz.
► This polymer contains BDT donor unit and bisthienyl-s-tetrazine acceptor unit.
► PBDT-TTz exhibited good thermal stability and low HOMO energy level.
► The PCE of the polymer solar cells is 3.32% under 100 mW/cm2 AM 1.5 illumination.
Journal: Solar Energy Materials and Solar Cells - Volume 100, May 2012, Pages 239–245