Provide are: a conjugated block copolymer capable of increasing the amount of optical absorption by a photoelectric conversion active layer and controlling the morphology thereof and capable of achieving excellent photoelectric conversion efficiency; and a photoelectric conversion element comprising a composition including an electron accepting material and this kind of conjugated block polymer. A π-electron conjugated block copolymer comprising: a polymer block (A) which involving a monomer unit having at least one heteroaryl skeleton selected from the group consisting of a fused π-conjugated skeleton, a fluorene, a carbazole, a dibenzosilole and a dibenzogermole containing at least one thiophene ring in a part of a chemical structure thereof; and a polymer block (B) involving a monomer unit of a thiophene-2,5-diyl group having a substituent at least at a 3-position thereof.
提供:一种共轭嵌段
聚合物,能够增加光电转换活性层的光吸收量并控制其形态,从而实现优异的光电转换效率;以及一种光电转换元件,其组成包括电子接受材料和这种共轭嵌段
聚合物。一种π电子共轭嵌段
聚合物,包括
聚合物嵌段(A),其单体单元至少具有一个杂芳基骨架,该杂芳骨架选自熔融π-共轭骨架、
芴、
咔唑、二
苯并
硅唑和二
苯并
锗醚组成的组;以及
聚合物嵌段(B),其单体单元为
噻吩-2,5-二基,至少在其 3 位具有取代基。