PBDT‐TBQ:PC71BM blend, which can explain that the IPCE spectra of the PBDT‐TPQ‐based solar cell were higher than that of the PBDT‐TBQ‐based solar cell. The maximum efficiency of PBDT‐TPQ‐based device reaches 4.40% which is much higher than 2.45% of PBDT‐TBQ, indicating that PQ unit is a promising electron‐acceptor moiety for BHJ solar cells. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016
基于苯并[1,2- b:4,5- b ']-二
噻吩(BDT)作为供体单元和苯并
喹喔啉(BQ)或
吡啶并
喹喔啉(PQ)类似物的两种D–π–A共聚物作为受体(
PBDT-TBQ和
PBDT-TPQ),被设计并合成为大块异质结(BHJ)光伏电池的ap型材料。与
PBDT-TBQ聚合物相比,
PBDT-TPQ表现出更强的分子内电荷转移,在红色区域显示出较宽的吸收范围,在1.5.2 eV处具有更窄的光学带隙,在-5.24 eV处具有相对较低的HOMO能级。实验数据表明,
PBDT-TPQ:PC 71 BM共混物的激子解离效率优于
PBDT-TBQ:PC 71BM blend,这可以解释为基于
PBDT-TPQ的太阳能电池的IPCE光谱高于基于
PBDT-TBQ的太阳能电池的IPCE光谱。基于
PBDT-TPQ的设备的最大效率达到4.40%,远高于
PBDT-TBQ的2.45%,这表明PQ单元是BHJ太阳能电池有希望的电子受体部分。©2016