Three-fold improvement in the performance of all-polymer photovoltaic devices with graphene
| Autor: | Fei Yu, Yan Jin, Vikram Kuppa |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Polymer nanocomposite Organic solar cell Graphene business.industry Open-circuit voltage Mechanical Engineering Energy conversion efficiency Nanotechnology Condensed Matter Physics Active layer law.invention Mechanics of Materials law Optoelectronics General Materials Science Polymer blend business Short circuit |
| Zdroj: | Materials Letters. 156:161-164 |
| ISSN: | 0167-577X |
| Popis: | Solar cells fabricated from a blend of the conjugated polymers poly(3-hexylthiophene) (P3HT) and poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) demonstrate a substantial improvement in power conversion efficiency ( η ) upon the addition of pristine graphene to the active layer. Cells display complex dependence on graphene concentration, and a maximum of three-fold enhancement in performance. This increase is entirely due to the higher short circuit current ( J sc ), since the open circuit voltage and fill factor are not affected. Cells also show greater bimolecular recombination with increasing graphene concentration. Device efficiency is demonstrated to be not only related to graphene content, but also to active layer thickness. |
| Databáze: | OpenAIRE |
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