Influence of molecular weight on the solar cell performance of double-crystalline donor-acceptor block copolymers

被引：71

作者：

Sommer, Michael ^{[1
]}

Huettner, Sven ^{[1
,2
]}

Steiner, Ullrich ^{[2
]}

Thelakkat, Mukundan ^{[1
]}

机构：

[1] Univ Bayreuth, Appl Funct Polymers & Dept Macromol Chem 1, D-95440 Bayreuth, Germany

[2] Univ Cambridge, Cavendish Lab, Dept Phys, Cambridge CB3 0HE, England

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 18期

关键词：

conducting polymers; hole mobility; molecular weight; organic semiconductors; polymer blends; solar cells; FILM MORPHOLOGY; POLYMER;

D O I：

10.1063/1.3257367

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the influence of the molecular weight of double-crystalline donor-acceptor block copolymers comprised of poly(3-hexylthiophene) as donor and poly(perylene bisimide acrylate) as acceptor segments on the device performance of polymer solar cells. Two block copolymers 1 and 2 exhibiting different molecular weights but the same composition are compared. Block copolymer 2 with the higher molecular weight shows an improvement in the hole carrier mobility mu(OFET) of more than two orders of magnitude, and an improvement in the external quantum efficiency of one order of magnitude reaching 31%, which is the highest reported value for a block copolymer system.

引用

页数：3

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