中文摘要：

通过聚合反应制备出一种新型宽吸收谱的四元共轭聚合物给体材料。以苯并二噻吩（BDT）单体作为D单元,以二酮吡咯并[3,4-c]吡咯（DPP）、苯并噻二唑（BT）和具有强吸电子能力的四氟苯（TFB）作为A单元进行聚合。该聚合物具有从300 nm到近红外光区域的宽吸收光谱、良好的热稳定性（403℃）、较窄的光学能带隙（1.52 e V）和较低的最高占据分子轨道能级（-5.21 e V）。将此聚合物与受体材料PC60BM混合制成的活性层应用到体异质结太阳能电池中,在没有加入任何添加剂进行修饰的情况下,电池初步的能量转换效率（PCE）达到1.26%。

英文摘要：

A new conjugated copolymer based on three electron-acceptoring units diketopyrrolo[3,4-c]pyrrole（DPP）,benzothiadiazole（BT） and tetrafluorobenzene（TFB）,one electron-donating unit benzodithiophene（BDT）has been successfully synthesized and characterized. The conjugated copolymer had both a broad absorption spectrum from 300 nm to the near infrared region and a longterm thermal stability for 10% weight loss at 403 ℃. Additionally, the fluorined copolymer exhibited a narrow optical bandgap of 1.52 e V and relatively lower-lying highest occupied molecular orbital energy level. The preliminary tests, on the bulk heterojunction solar cells using this polymer as an electron donor and PC60 BM as an electron acceptor,achieved a power conversion efficiency of 1.26% without any other processing additives.