The present invention provides a macromolecular compound by which the short-circuit current density and the photoelectric conversion efficiency are enhanced when the macromolecular compound is used in an organic layer contained in a photovoltaic cell. Specifically, the present invention provides a macromolecular compound having a structural unit represented by Formula (1):
wherein Ar1 and Ar2 are the same as or different from each other and represent a trivalent heterocyclic group; X1 represents —O—, —S—, —C(═O)—, —S(═O)—, —SO2—, —Si(R3)(R4)—, —N(R5)—, —B(R6)—, —P(R7)—, or —P(═O)(R8)—; and R51 represents an alkyl group having 6 or more carbon atoms, an alkyloxy group having 6 or more carbon atoms, an alkylthio group having 6 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aryloxy group having 6 or more carbon atoms, an arylthio group having 6 or more carbon atoms, an arylalkyl group having 7 or more carbon atoms, an arylalkyloxy group having 7 or more carbon atoms, an arylalkylthio group having 7 or more carbon atoms, an acyl group having 6 or more carbon atoms, or an acyloxy group having 6 or more carbon atoms.
本发明提供了一种高分子化合物,当该高分子化合物用于光伏电池中的有机层时,可提高短路电流密度和光电转换效率。具体而言,本发明提供了一种高分子化合物,其结构单元由式(1)表示:
其中 Ar1 和 Ar2 彼此相同或不同,代表三价杂环基团;X1 代表-O-、-S-、-C(═O)-、-S(═O)-、-SO2-、-Si(R3)(R4)-、-N(R5)-、-B(R6)-、-P(R7)- 或-P(═O)(R8)-;和 R51 代表具有 6 个或更多碳原子的烷基、具有 6 个或更多碳原子的烷氧基、具有 6 个或更多碳原子的烷
硫基、具有 6 个或更多碳原子的芳基、具有 6 个或更多碳原子的芳氧基、具有 6 个或更多碳原子的芳
硫基、具有 7 个或更多碳原子的芳烷基、具有 7 个或更多碳原子的芳烷氧基、具有 7 个或更多碳原子的芳烷基
硫基、具有 6 个或更多碳原子的酰基或具有 6 个或更多碳原子的酰氧基。