Theoretical insight into the stereometric effect of bisPC71BM on polymer cell performance
| Autor: | Wen-Peng Wu, Lin-Long Deng, Xiang Li, Yi Zhao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Electron mobility Multidisciplinary Organic solar cell Energy conversion efficiency 02 engineering and technology Polymer Electron 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystal Electron transfer chemistry Computational chemistry Chemical physics Density functional theory 0210 nano-technology |
| Zdroj: | Science Bulletin. 61:139-147 |
| ISSN: | 2095-9273 |
| DOI: | 10.1007/s11434-015-0984-8 |
| Popis: | It has been experimentally demonstrated that the stereometric packings of two new bisPC71BM isomers have an important impact on the power conversion efficiency of organic solar cells. Here, a theoretical investigation is made to reveal the mechanism behind from detailed photophysical processes in performed cells. The results show that the crystal packings of isomers affect the electron mobilities dominantly from the electronic coupling for electron transfer, and the trends of calculated mobilities are consistent with experimental measurements although the magnitudes are obviously larger. For the performed cells from two isomers with poly(3-hexylthiophene) as a donor, it is found that the exciton dissociation yields are also different, manifesting that stereometric packings essentially control the cell efficiency via both electron mobilities and exciton dissociation. Furthermore, the reasons for low cell efficiencies are analyzed, and possible improvements are suggested. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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