A method for the synthesis of well-defined rod-coil block copolymers consisting of P3HT donor and C
60
acceptor chromophores (P3HT-b-P(S
x
A
y
)-C
60
) in a molecular architecture is reported for use in bulk-heterojunction (BHJ) solar cells. In thin films of the resulting block copolymer, reproducible self-assembly into well-defined “nanofibrils” is observed. This is the first example of a block copolymer containing a C
60
derivative that shows exclusively a nanofibrilar structure. A substantial improvement in device performance is achieved when the block copolymer is used as a “surfactant” for controlling the interface morphology of the P3HT:PCBM donor-acceptor phase domains within the composite.
报道了一种用于合成P3HT给体和C60受体色团(P3HT-b-P(SxAy)-C60)的明确定义的棒-线嵌段共聚物的方法,以用于块状异质结(BHJ)太阳能电池。在所得嵌段共聚物的薄膜中,观察到可重复的自组装成明确定义的“纳米纤维”。这是第一个包含C60衍
生物的嵌段共聚物,仅显示纳米纤维结构的示例。当将嵌段共聚物用作控制复合材料中P3HT:PCBM给受体相区界面形态的“表面活性剂”时,可以实现设备性能的显著提高。