Ambipolar charge transport in polymer:fullerene bulk heterojunctions for different polymer side-chains

被引：11

作者：

Fall, S. ^{[1
]}

Biniek, L. ^{[2
]}

Leclerc, N. ^{[2
]}

Leveque, P. ^{[1
]}

Heiser, T. ^{[1
]}

机构：

[1] Univ Strasbourg, CNRS, Inst Elect Solide & Syst, F-67037 Strasbourg, France

[2] Univ Strasbourg, Ecole Europeenne Chim, Lab Ingn Polymeres Hautes Technol, F-67087 Strasbourg, France

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 12期

关键词：

FIELD-EFFECT TRANSISTORS; COPOLYMERS; BLENDS;

D O I：

10.1063/1.4754590

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We use field-effect transistors to investigate electron and hole mobilities in polymer: fullerene blends. Low-band-gap polymers with a common conjugated backbone and differing side-chains are utilized in order to clarify the link between the side-chain molecular structure and grafting position, and the power-conversion efficiency of related bulk heterojunction solar cells. The results show that, at a fixed polymer: fullerene weight ratio, the electron mobility increases by more than four orders of magnitude when changing from linear to branched side-chains. As a consequence, the photovoltaic performances are highest at low fullerene contents for branched chains while the opposite is true for linear chains. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4754590]

引用

页数：4

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