Drastic Change of Molecular Orientation in a Thiazolothiazole Copolymer by Molecular-Weight Control and Blending with PC61BM Leads to High Efficiencies in Solar Cells

被引：154

作者：

Osaka, Itaru ^{[1
,2
]}

Saito, Masahiko ^{[1
]}

Mori, Hiroki ^{[1
]}

Koganezawa, Tomoyuki ^{[3
]}

Takimiya, Kazuo ^{[1
,4
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Hiroshima 7398527, Japan

[2] Japan Sci & Technol Agcy, Precursory Res Embryon Sci & Technol PRESTO, Chiyoda Ku, Tokyo 1020075, Japan

[3] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[4] Hiroshima Univ, Inst Adv Mat Res, Higashihiroshima 7398530, Japan

来源：

ADVANCED MATERIALS | 2012年 / 24卷 / 03期

关键词：

bulk heterojunctions; solar cells; molecular orientation; semiconducting polymers; thiazolothiazole; OPEN-CIRCUIT VOLTAGE; HIGH PHOTOVOLTAIC PERFORMANCE; ORGANIC PHOTOVOLTAICS; CONJUGATED POLYMER; ATOM;

D O I：

10.1002/adma.201103065

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7%. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.

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页码：425 / +

页数：7

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