| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1264591 | Organic Electronics | 2012 | 9 Pages |
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.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► New fullerene derivatives showed similar electronic properties to PCBM. ► Chloronaphthalene additive changed the aggregated morphology to homogeneous. ► Improved morphology induces enhanced performance of solar cells and bipolar FETs. ► Processing additive also can significantly affect on fullerene acceptor component.
