properties were also studied. For both solar cell and transistor devices, moving the branching point further from the backbone was beneficial. This is the first time that this effect has been shown to improve solar cell performance. Strong evidence is presented for changes in microstructure across the series, which is most likely the cause for the photocurrent enhancement.
系统地将烷基链支化位置远离聚合物主链,得到两种新的
噻吩并 [3,2-b]
噻吩-二酮
吡咯并
吡咯 (
DPPTT-T) 聚合物。当用作聚合物:
富勒烯太阳能电池的供体材料时,在不使用加工添加剂的情况下实现了超过 7% 的效率。使用 X 射线散射技术研究了烷基链支化点的位置对薄膜形态的影响,并研究了对光伏和电荷传输特性的影响。对于太阳能电池和晶体管器件,将分支点移离主干更远是有益的。这是第一次证明这种效应可以提高太阳能电池的性能。为整个系列的微观结构变化提供了强有力的证据,