Four benzotrithiophene (BTT) based donor–acceptor polymers have been prepared by alternating with diketopyrrolopyrrole (DPP), thiazolo[5,4-d]thiazole (TTz), thieno[3,4-c]pyrrole-4,6-dione (TPD) and thiadiazolo[3,4-g]quinoxaline (DTBTQx). The BTT-based polymers possess good solubility in common organic solvents and excellent thermal stability. PBTTDPP and PBTTDTBTQx possessed an optical bandgap of 1.27 eV and 1.20 eV, with absorption spectra extending to the near-infrared region. The bulk-heterojunction solar cells delivered a highest PCE of 1.39%, with a short circuit current of 5.46 mA cm−2, an open-circuit voltage of 0.51 V and a fill factor of 0.50.
四种基于苯并三
噻吩(B
TT)的供体-受体聚合物已经通过二酮
吡咯吡咯(
DPP)、
噻唑并[5,4-d]
噻唑(
TTz)、
噻吩并[3,4-c]
吡咯-4,6-二酮(
TPD)和
噻二唑并[3,4-g]
喹喔啉(DTBTQx)的交替制备而成。基于B
TT的聚合物在常见的有机溶剂中具有良好的溶解性和优异的热稳定性。PB
TTDPP和PB
TTDTBTQx的光带隙分别为1.27 eV和1.20 eV,吸收光谱延伸到近红外区域。体异质结太阳能电池的最高PCE为1.39%,短路电流为5.46 mA cm-2,开路电压为0.51 V,填充因子为0.50。