Effect of Fullerenes on Crystallization-Induced Aggregation in Polymer Photovoltaics Casting Solutions

被引：27

作者：

Sobkowicz, Margaret J. ^{[1
]}

Jones, Ronald L. ^{[1
]}

Kline, R. Joseph ^{[1
]}

DeLongchamp, Dean M. ^{[1
]}

机构：

[1] NIST, Div Polymers, Gaithersburg, MD 20899 USA

来源：

MACROMOLECULES | 2012年 / 45卷 / 02期

基金：

美国国家科学基金会;

关键词：

FIELD-EFFECT MOBILITY; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); MOLECULAR CHARACTERIZATION; THERMOREVERSIBLE GELATION; CONJUGATED POLYMER; SELF-ORGANIZATION; SCATTERING; POLYTHIOPHENE; PERFORMANCE; DEPENDENCE;

D O I：

10.1021/ma202083q

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We measure the time- and temperature-dependent aggregation of the organic photovoltaic polymer poly(3-hexylthiophene) in o-dichlorobenzene solution using small-angle neutron scattering and rheometry. Results from this study provide guidance for formulation stability assessment and process-dependent morphology optimization. The aggregates are similar to the supramolecular crystalline structures found in annealed films and poor solvents. The addition of phenyl-C61-butyric acid methyl ester (PCBM) molecules to the polymer solution slows the aggregation rate by about 10-fold. PCBM addition also appears to reduce the overall extent of crystallization in solution. Dynamic theological measurements show thermoreversible mechanical stiffening of the solutions into gel-like solids with a physical cross-link density that depends on temperature and oscillation frequency.

引用

页码：1046 / 1055

页数：10

共 55 条

[1] STRUCTURAL CHARACTERIZATION OF C-60 AND C-70 FULLERENES BY SMALL-ANGLE NEUTRON-SCATTERING [J].