Three new selenophene-based conjugated copolymers having different ratios of the monomeric units were designed, synthesized and thoroughly characterized. The introduction of an electron-poor and surfaced building moiety like selenathiazole was highly efficient in tuning the bandgap and polymer properties. The chalcogenophene-based medium-bandgap polymers demonstrated low-lying HOMO energy levels (∼5.87 eV), which is benign for use in multi-junction polymer solar cell applications. The representative polymers with heavy atoms revealed the change in electronegativity and atomic size that highly affected the molecular property, its topological features, and photovoltaic properties in polymer solar cells. The selenium-substituted (0.5:0.5) polymer donors showed power conversion efficiencies above 3% when combined with [6,6]-phenyl-C71-butyric acid methyl ester (PC₇₀BM) acceptors in a quintessential bulk-heterojunction solar cell.

设计，合成并充分表征了三种新型的具有不同单体单元比例的硒烯基共轭共聚物。引入电子贫乏的表面结构部分（如硒代噻唑）在调节带隙和聚合物性能方面非常有效。基于硫属元素的中带隙聚合物表现出较低的HOMO能级（〜5.87 eV），对于多结聚合物太阳能电池应用而言是良性的。具有重原子的代表性聚合物显示出电负性和原子尺寸的变化极大地影响了聚合物太阳能电池的分子特性，其拓扑特征和光伏特性。当与[6，典型的本体异质结太阳能电池中的₇₀ BM）受体。