Facile Monitoring of Fullerene Crystallization in Polymer Solar Cell Blends by UV- vis Spectroscopy

被引：16

作者：

Lindqvist, Camilla ^{[1
]}

Wang, Ergang ^{[1
]}

Andersson, Mats R. ^{[1
]}

Mueller, Christian ^{[1
]}

机构：

[1] Chalmers, Dept Chem & Biol Engn Polymer Technol, S-41296 Gothenburg, Sweden

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2014年 / 215卷 / 06期

基金：

瑞典研究理事会;

关键词：

bulk heterojunctions; crystal growth; glass transition temperature; organic photovoltaics; UV-vis spectroscopy; ORGANIC PHOTOVOLTAIC BLENDS; PHASE-BEHAVIOR; PERFORMANCE; STABILITY; QUINOXALINE;

D O I：

10.1002/macp.201300717

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A simple technique is demonstrated based on UV-vis spectroscopy that permits the onset of fullerene crystallization to be monitored in polymer:fullerene bulk-heterojunction blends. The growth of fullerene crystals only occurs during thermal annealing above the glass transition temperature (T-g) of the blend. Light scattering due to the presence of micrometer-sized fullerene crystals reduces the apparent transmittance, which can serve as a clear indicator for the upper limit of the T-g. This principle is used to deduce this critical parameter for two high-performance photovoltaic blends that are based on a thiophene-quinoxaline and a thiophene-isoindigo copolymer, respectively. High T(g)s of 115 and 145 degrees C promise good thermal stability. <boxed-text content-type="graphic" position="anchor"> <graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="urn:x-wiley:10221352:media:macp201300717:macp201300717-abs-0001">image</graphic

引用

页码：530 / 535

页数：6

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