Effect of regioisomeric substitution patterns on the performance of quinoxaline-based dye-sensitized solar cells
| Autor: | Chang Young Jung, Jong Min Park, Jae Yun Jaung, Seong Je Park, Woo Dong Jang, Hyun Choi, Yue Wang, Pinyin Ou |
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| Rok vydání: | 2019 |
| Předmět: |
Photocurrent
Hydrogen bond General Chemical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Dye-sensitized solar cell Quinoxaline chemistry Phenothiazine Electrochemistry Proton NMR Cyclic voltammetry 0210 nano-technology HOMO/LUMO |
| Zdroj: | Electrochimica Acta. 298:650-662 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2018.12.133 |
| Popis: | Regioisomeric quinoxaline-based dyes (NQXs) were synthesized to study the effect of substitution patterns on the performance of quinoxaline-based dye sensitized solar cells (DSSCs). The 1H NMR results indicated that the substitution patterns of ethylene groups on the quinoxaline unit greatly affect the molecular architecture through C H⋯N hydrogen bonding, which also influenced the absorption and efficiency of the DSSCs. The highest occupied molecular orbital (HOMO) levels of the NQXs were estimated to range from 0.94 to 0.99 V by cyclic voltammetry and visible absorption studies, which is suitable for DSSCs. The photocurrent density-voltage curves and incident photon-to-electron conversion efficiency spectra of NQXs indicated that the introduction of phenothiazine groups at the 2- and 3-positions of quinoxaline is the most effective pattern for quinoxaline-based organic sensitizers in DSSCs. |
| Databáze: | OpenAIRE |
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