The effect of processing additive on aggregated fullerene derivatives in bulk-heterojunction polymer solar cells

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• 作者：Jung Hwa Seo^a ; Sun Young Nam^b ; Kwang-Sup Lee^b ; ^kslee@hnu.kr ; Tae-Dong Kim^b ; Shinuk Cho^c ; ^{sucho@ulsan.ac.kr}
• 关键词：Processing additives ; Fullerene derivatives ; Field-effect transistors ; Polymer solar cells ; Nano-scale morphology
• 刊名：Organic Electronics
• 出版年：2012
• 期刊代码：137_15661199
• 类别：et
• 出版时间：April, 2012
• 卷：13
• 期：4
• 页码：570-578
• 文件大小：1395 K

摘要

The effects of processing additive on fullerene aggregation in polymer BHJ solar cells were investigated using new fullerene derivatives bearing a thiophene moiety and alkyl groups. Although new fullerene derivatives showed quite similar electronic transport properties in field-effect transistors, the photovoltaic performances were significantly limited by their aggregative nature. Processing with 1%CN additive, however, changed the aggregated morphology of BHJ films to a smoother and homogeneous morphology, improving photovoltaic performance. The result indicates that processing additive not only influences on polymer side, but also significantly affects fullerene acceptor component.