An ADMET Route to Low-Band-Gap Poly(3-hexadecylthienylene vinylene): A Systematic Study of Molecular Weight on Photovoltaic Performance

被引：40
作者：
Speros, Joshua C. [2 ]
Paulsen, Bryan D. [1 ]
White, Scott P. [3 ]
Wu, Yanfei [1 ]
Jackson, Elizabeth A. [2 ]
Slowinski, Bradley S. [1 ]
Frisbie, C. Daniel [1 ]
Hillmyer, Marc A. [2 ]
机构：
[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
[2] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA
[3] Univ Iowa, Dept Chem & Biochem Engn, Iowa City, IA 52242 USA
来源：
MACROMOLECULES | 2012年 / 45卷 / 05期
关键词：
ORGANIC SOLAR-CELLS; DIENE METATHESIS POLYMERIZATION; SOLUBLE PRECURSOR POLYMER; FIELD-EFFECT MOBILITY; POLY(THIENYLENE VINYLENE); PHASE-BEHAVIOR; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); POLY(2,5-THIENYLENE VINYLENE); SOLID-STATE; BLENDS;
D O I：
10.1021/ma3000434
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The effect of molecular weight on organic photovoltaic device performance is investigated for a series of low-band-gap (ca. 1.65 eV) poly(3-hexadecylthienylene vinylene)s (C16-PTVs) prepared by acyclic diene metathesis (ADMET) polymerization. By utilizing monomers of varying cis:trans (Z:E) content, seven C16-PTVs were prepared with a number-average molecular weight range of 6-30 kg/mol. Polymers were characterized by size-exclusion chromatography, H-1 NMR spectroscopy, ultraviolet-visible spectroscopy, thermogravimetric analysis, wide-angle X-ray scattering, and differential scanning calorimetry. C16-PTVs were integrated into bulk-heterojunction (BHJ) solar cells with [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM), and conversion efficiency was found to increase with increasing molecular weight. This observation is attributable to an increase in polymer aggregation in the solid state and a corresponding increase in hole mobility. Finally, phase behavior and morphology of the C16-PTV:PCBM active layers were investigated by differential scanning calorimetry and atomic force microscopy, respectively.
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收藏
页码：2190 / 2199
页数：10
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