Two benzotriazole-based polymer donors, poly[4-(5-(2,5-bis((2-hexyldecyl]oxy]-4-(thiophene-2-yl]-phenyl]thiophene-2-yl]-5,6-difluoro-2-octyl-2H-benzo [d][1,2,3]triazole] (PPBTA-2HD) and poly[4-(5-(2,5-bis((2-hexyltridecyl]oxy]-4-(thiophene-2-yl]-phenyl]thiophene-2-yl]-5,6-difluoro-2-octyl-2H-benzo[d][1,2,3] triazole] (PPBTA-5HD), were synthesized, and their physical, optical, and electrochemical properties were characterized. The backbones of two polymers contain fluorine in the benzotriazole and alkoxy substituents in the phenylene units, resulting in molecular planarity by exploiting S⋯O and S⋯F noncovalent interactions. PPBTA-2HD and PPBTA-5HD were used as electron donors and [6,6]-phenyl-C₇₁-butyric acid methyl ester (PC₇₁BM] as an electron acceptor in the active layer of the bulk-hetero-junction solar cells. PPBTA-5HD exhibited better device performance than PPBTA-2HD, with a power conversion efficiency of 2.82% and a short-circuit current of 6.52 mA/cm². Analysis of the microstructural film morphologies of two polymers by 2D-grazing incident X-ray diffraction revealed that PPBTA-5HD had higher crystallinity than PPBTA-2HD, leading to better device performance.

两个基于苯并三唑的聚合物供体，聚[4-（5-（2,5-双（（2-己基癸基]氧基] -4-（噻吩-2-基）-苯基]噻吩-2-基] -5， 6-二氟-2-辛基-2 H-苯并[ d ] [1,2,3]三唑]（PPBTA-2HD）和聚[4-（5-（2,5-双（（2-己基十三烷基）]氧基] -4-（噻吩-2-基]-苯基]噻吩-2-基] -5,6-二氟-2-辛基-2 H-苯并[ d ] [1,2,3]三唑]（PPBTA-合成了5HD）并对其物理，光学和电化学性质进行了表征。两种聚合物的主链在苯并三唑中含有氟，在亚苯基单元中含有烷氧基取代基，通过利用S⋯O和S⋯F非共价键导致分子平面度PPBTA-2HD和PPBTA-5HD被用作电子给体，[6,6]-苯基-C ₇₁-丁酸甲酯（PC ₇₁ BM）作为体异质结太阳能电池活性层中的电子受体，PPBTA-5HD的器件性能优于PPBTA-2HD，功率转换效率为2.82％，短路电流为6.52 mA / cm ^2。通过二维掠射X射线衍射分析两种聚合物的微结构膜形态，发现PPBTA-5HD的结晶度高于PPBTA-2HD，从而获得更好的器件性能。