Benzo[1,2-b:4,5-b′]difuran and furan substituted diketopyrrolopyrrole alternating copolymer for organic photovoltaics with high fill factor
作者:Jia Du、Andria Fortney、Katherine E. Washington、Michael C. Biewer、Tomasz Kowalewski、Mihaela C. Stefan
DOI:10.1039/c7ta04618a
日期:——
comparison to the conjugated polymers synthesized from thiophene or thiophene derivatives, furan and its derivatives are promising alternative building units due to their desirable properties such as smaller heteroatom size, more electronegative heteroatom, and larger dipole moment. Considering the advantages of furan units, conjugated polymers synthesized from furan and its derivatives show a higher degree
与由噻吩或噻吩衍生物合成的共轭聚合物相比,呋喃及其衍生物因其所需的特性(例如较小的杂原子尺寸,较大的负电性杂原子和较大的偶极矩)而成为有前途的替代建筑单元。考虑到呋喃单元的优点,由呋喃及其衍生物合成的共轭聚合物显示出更高的共轭度,相邻单元之间的扭曲减少,π堆积距离更小,溶解度得到改善。迄今为止,尽管对由呋喃衍生物构成的聚合物的研究受到关注,但仅由呋喃或其衍生物构成的共轭聚合物仍然很少。在这里,我们报道了一种新的共轭聚合物,聚(4,8-双(5-(2-(乙基乙基己基)呋喃-2-基)苯并[1,2- b:4,5- b′] difuran - alt -2,5-didodecyl-3,6-di(furan-2-yl)pyrrolo [3,4- c ] pyrrole-1,4(2 H,5 H)-dione),P(BDF-FDPP),用于有机太阳能电池。P(BDF-FDPP)呋喃中的氧原子较小,导致平面共轭骨架具有较小的扭转强度(二面角<0