Influence of molecular weight distribution on the gelation of P3HT and its impact on the photovoltaic performance

Markus Koppe; Christoph J. Brabec; Sabrina Heiml; Alois Schausberger; Warren Duffy; Martin Heeney; Iain McCulloch

doi:10.1021/ma9005445

Influence of molecular weight distribution on the gelation of P3HT and its impact on the photovoltaic performance

Markus Koppe, Christoph J. Brabec, Sabrina Heiml, Alois Schausberger, Warren Duffy, Martin Heeney, Iain McCulloch

Research output: Contribution to journal › Article › peer-review

143 Scopus citations

Abstract

P3HT is a semirigid and semicrystalline polymer with a strong tendency to postcrystallize in solid films upon thermal annealing. Recent investigations snowed that macroscopic, crystalline P3HT fibers can already be precipitated from solution, depending on 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. © 2009 American Chemical Society.

Original language	English (US)
Pages (from-to)	4661-4666
Number of pages	6
Journal	Macromolecules
Volume	42
Issue number	13
DOIs	https://doi.org/10.1021/ma9005445
State	Published - Jul 14 2009
Externally published	Yes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-14

ASJC Scopus subject areas

Materials Chemistry
Organic Chemistry
Polymers and Plastics
Inorganic Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/ma9005445

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title = "Influence of molecular weight distribution on the gelation of P3HT and its impact on the photovoltaic performance",

abstract = "P3HT is a semirigid and semicrystalline polymer with a strong tendency to postcrystallize in solid films upon thermal annealing. Recent investigations snowed that macroscopic, crystalline P3HT fibers can already be precipitated from solution, depending on 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. {\textcopyright} 2009 American Chemical Society.",

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AU - Koppe, Markus

AU - Brabec, Christoph J.

AU - Heiml, Sabrina

AU - Schausberger, Alois

AU - Duffy, Warren

AU - Heeney, Martin

AU - McCulloch, Iain

N1 - Generated from Scopus record by KAUST IRTS on 2023-02-14

PY - 2009/7/14

Y1 - 2009/7/14

N2 - P3HT is a semirigid and semicrystalline polymer with a strong tendency to postcrystallize in solid films upon thermal annealing. Recent investigations snowed that macroscopic, crystalline P3HT fibers can already be precipitated from solution, depending on 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. © 2009 American Chemical Society.

AB - P3HT is a semirigid and semicrystalline polymer with a strong tendency to postcrystallize in solid films upon thermal annealing. Recent investigations snowed that macroscopic, crystalline P3HT fibers can already be precipitated from solution, depending on 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. © 2009 American Chemical Society.

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U2 - 10.1021/ma9005445

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JO - Macromolecules

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IS - 13

ER -

Influence of molecular weight distribution on the gelation of P3HT and its impact on the photovoltaic performance

Abstract

Bibliographical note

ASJC Scopus subject areas

UN SDGs

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