Photovoltaic performance and morphology of polyfluorene blends: The influence of phase separation evolution

被引：35

作者：

Shikler, Rafi ^{[1
]}

Chiesa, Marco ^{[1
]}

Friend, Richard H. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

MACROMOLECULES | 2006年 / 39卷 / 16期

关键词：

D O I：

10.1021/ma060421m

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We report the composition profile in blends of hole-accepting and electron-accepting polyfluorenes. During solvent evaporation to form thin (similar to 150 nm thickness) solid films, demixing of the polymers produces micrometer scale lateral phase separation. We show here that demixing is more complete in regions closer to the interface between the two phases. We propose that carriers transport is easier in these regions than in the bulk. We show how this affects the photovoltaic efficiency of diodes made with these blends, which show a linear dependence of efficiency on the length of the interface between the phases.

引用

页码：5393 / 5399

页数：7

共 53 条

[1] Surface topography and composition of deuterated polystyrene-poly(bromostyrene) blends [J].