Improving photoconductance of fluorinated donors with fluorinated acceptors
| Autor: | Logan E. Garner, Bryon W. Larson, Zbyslaw R. Owczarczyk, Steven H. Strauss, Wade A. Braunecker, Stefan D. Oosterhout, Nikos Kopidakis, Dana C. Olson, Olga V. Boltalina |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Fullerene Photoconductivity 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Acceptor Small molecule 0104 chemical sciences Organic semiconductor Microwave conductivity Molecule Organic chemistry Charge carrier 0210 nano-technology |
| Zdroj: | 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC). |
| DOI: | 10.1109/pvsc.2016.7749776 |
| Popis: | This work investigates the influence of fluorination of both donor and acceptor materials on the generation of free charge carriers in small molecule donor/fullerene acceptor BHJ OPV active layers. A fluorinated and non-fluorinated small molecule analogue were synthesized and their optoelectronic properties characterized. The intrinsic photoconductance of blends of these small molecule donors was investigated using time-resolved microwave conductivity. Blends of the two donor molecules with a traditional non-fluorinated fullerene (PC 70 BM) as well as a fluorinated fullerene (C 60 (CF 3 )2-1) were investigated using 5% and 50% fullerene loading. We demonstrate for the first time that photoconductance in a 50:50 donor:acceptor BHJ blend using a fluorinated fullerene can actually be improved relative to a traditional non-fluorinated fullerene by fluorinating the donor molecule as well. |
| Databáze: | OpenAIRE |
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