Influence of Molecular Weight Distribution on the Gelation of P3HT and Its Impact on the Photovoltaic Performance

被引：143

作者：

Koppe, Markus ^{[1
]}

Brabec, Christoph J. ^{[1
,2
]}

Heiml, Sabrina ^{[3
]}

Schausberger, Alois ^{[3
]}

Duffy, Warren ^{[4
]}

Heeney, Martin ^{[5
]}

McCulloch, Iain ^{[5
]}

机构：

[1] Konarka Technol GmbH, A-4040 Linz, Austria

[2] Konarka Technol GmbH, D-90443 Nurnberg, Germany

[3] Johannes Kepler Univ Linz, A-4040 Linz, Austria

[4] Merck Chem, Southampton, Hants, England

[5] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

来源：

MACROMOLECULES | 2009年 / 42卷 / 13期

关键词：

POLYMER SOLAR-CELLS; CHARGE-TRANSPORT; POLY(3-HEXYLTHIOPHENE); MORPHOLOGY; MOBILITY; POLYTHIOPHENE; NETWORK; FILMS;

D O I：

10.1021/ma9005445

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

P3HT is a semirigid and semicrystalline polymer with a strong tendency to postcrystallize in solid films upon thermal annealing. Recent investigations showed that macroscopic, crystalline P3HT Fibers can already be precipitated from solution, depending oil the combination of solvent systems used. In this paper we investigate the mechanism and the dynamics of gelation in P3HT solutions. Rheological and absorption measurements in solution reveal a distinct two-step mechanism. In a first step, aggregates are formed which, in a second step, link to each other into a thermoreversible gel. The correlation between the gelation dynamics and the Molecular weight distribution is discussed in more detail for a nonhazardous, printing friendly solvent system.

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收藏

页码：4661 / 4666

页数：6

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