聚芴
材料科学
聚合物混合物
旋涂
带隙
薄膜
富勒烯
涂层
化学工程
聚合物
分析化学(期刊)
高分子化学
复合材料
有机化学
光电子学
共聚物
化学
纳米技术
工程类
作者
Cecilia M. Björström,Andrzej Bernasik,Jakub Rysz,Andrzej Budkowski,Svante Nilsson,Mattias Svensson,Mats R. Andersson,Karin Magnusson,Ellen Moons
标识
DOI:10.1088/0953-8984/17/50/l01
摘要
Blends of the low-bandgap polymer poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-5,5- (4',7'-di-2-thienyl-2',1',3'-benzothiadiazole] (APFO-3) and the fullerene derivative [6,6]-phenyl–C61–butyric acid methyl ester (PCBM) were spin-coated from chloroform solution into thin films, which were examined with dynamic secondary ion mass spectrometry. For blends with high PCBM content, the depth profiles show composition waves that were caused by surface-directed phase separation during spin-coating. The formation of such multilayer structures by spontaneous self-stratification is likely to have implications for optimization strategies for the performance of organic solar cells.
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