Main-Chain Fullerene Polymers for Photovoltaic Devices

作者：Hiorns Roger C^*; Cloutet Eric; Ibarboure Emmanuel; Vignau Laurence; Lemaitre Noella; Guillerez Stephane; Absalon Christelle; Cramail Henri

来源：Macromolecules, 2009, 42(10): 3549-3558.

DOI：10.1021/ma900279a

A prototype for a new class of macromolecules with a high fraction of fullerene is proposed. Their facile synthesis, modular structure, electronic activity, and novel solid-state behavior make them promising materials for photovoltaic applications. Controlled reversible-deactivation radical additions of the sterically bulky 1,4-bis(methylcyclohexyl ether)-2,5-dibronlomethyl benzene to fullerene are indicated by GPC, NMR, and TGA Studies to yield oligomers and polymers containing C(60) in the main chain. UV and cyclic voltammetry indicate that the C60 undergoes mainly 1,4-additions and a minority (ca. 20%) of 1,2-additions to make a regio-irregular macromolecule. The same reaction performed in the presence of 1,4-bis(methylcyclohexyl ether)-2-bromomethyl benzene, resulting in macromolecules with bromomethyl-tree chain ends, permitted confirmation of the aforementioned characteristics. The unusual reptation of the poly {(1,4-fullerene)-alt-[14-dimethylene-2,5-bis(cyclohexylmethyl ether) phenylene]}s (PFDP) in an Al/Ca/poly(3-hexylthiophene)-blend-PFDP/PEDOT-blend-PSS/ITO/glass structured device is demonstrated by AFM to yield nanoclusters at a scale (ca. 20 run) favorable to exciton capture. Even without optimization of the chemical structure or the device, this prototype reached promising power conversion efficiencies of 1.6%.

• 出版日期2009-5-26
• 单位中国地震局