Effect of Diels–Alder Reaction in C60-Tetracene Photovoltaic Devices
Autor: | David R. Diercks, Andrew P. Proudian, Jeramy D. Zimmerman, Brian P. Gorman, Christelle Lyiza, Matthew B. Jaskot |
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Rok vydání: | 2016 |
Předmět: |
Materials science
Fullerene Organic solar cell Mechanical Engineering Exciton Bioengineering Heterojunction 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Tetracene chemistry Monolayer General Materials Science 0210 nano-technology Acene Diels–Alder reaction |
Zdroj: | Nano Letters. 16:6086-6091 |
ISSN: | 1530-6992 1530-6984 |
Popis: | Developing organic photovoltaic materials systems requires a detailed understanding of the heterojunction interface, as it is the foundation for photovoltaic device performance. The bilayer fullerene/acene system is one of the most studied models for testing our understanding of this interface. We demonstrate that the fullerene and acene molecules chemically react at the heterojunction interface, creating a partial monolayer of a Diels–Alder cycloadduct species. Furthermore, we show that the reaction occurs during standard deposition conditions and that thermal annealing increases the concentration of the cycloadduct. The cycloaddition reaction reduces the number of sites available at the interface for charge transfer exciton recombination and decreases the charge transfer state reorganization energy, increasing the open circuit voltage. The submonolayer quantity of the cycloadduct renders it difficult to identify with conventional characterization techniques; we use atom probe tomography to overcome this... |
Databáze: | OpenAIRE |
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