Two novel cyclopentadithiophene-based alternating copolymers as potential donor components for high-efficiency bulk-heterojunction-type solar cells

被引：175

作者：

Moule, Adam J. ^{[1
,5
]}

Tsami, Argiri ^{[2
,3
]}

Buennagel, Torsten W. ^{[2
,3
]}

Forster, Michael ^{[2
,3
]}

Kronenberg, Nils M. ^{[1
]}

Scharber, Markus ^{[4
]}

Koppe, Markus ^{[4
]}

Morana, Mauro ^{[4
]}

Brabec, Christoph J. ^{[4
]}

Meerholz, Klaus ^{[1
]}

Scherf, Ullrich ^{[2
,3
]}

机构：

[1] Univ Cologne, Inst Phys Chem, D-50939 Cologne, Germany

[2] Berg Univ Wuppertal, Macromol Chem Grp, D-42097 Wuppertal, Germany

[3] Berg Univ Wuppertal, Inst Polymer Technol, D-42097 Wuppertal, Germany

[4] Konarka Austria GmbH, A-4040 Linz, Austria

[5] Univ Calif Davis, Davis, CA 95616 USA

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 12期

关键词：

D O I：

10.1021/cm8006638

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polymer/fullerene bulk heterojunctions have recently generated a lot of scientific interest due to their potential in low-cost photovoltaic applications. In this paper we detail the synthesis and characterization of two new low-band-gap polythiophenes, poly[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene-2,6-diyl-alt-4,7-bis(2-thienyl)-2,1,3-benzothiadiazole-5',5 ''-diyl] (PCPDTTBTT) and poly [4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene-2,6-diyl-alt-2,3-dioctylquinoxaline-5,8-diyl] (PCPDTQ), for use in these applications. The PCPDTQ polymer did not produce efficient solar cells. A high power efficiency of 2.1% under one sun was found for a PCPDTTBTT/fullerene mixture. The high efficiency was achieved by alteration of the morphology using a solvent additive. Analysis of atomic force microscopy phase images shows that material phases with distinct mixing ratios are formed and altered with the addition of the solvent additive.

引用

页码：4045 / 4050

页数：6

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