Nitrogen-Doped Graphene/Platinum Counter Electrodes for Dye-Sensitized Solar Cells
| Autor: | Shu-Te Ho, Chuan-Pei Lee, Yu-Wen Chi, Chin An Lin, Jr-Hau He, Tzu Chiao Wei, K. P. Huang |
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| Rok vydání: | 2014 |
| Předmět: |
Auxiliary electrode
Materials science Graphene Inorganic chemistry Fermi level chemistry.chemical_element Electrolyte Tin oxide Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Dye-sensitized solar cell Electron transfer symbols.namesake chemistry law symbols Electrical and Electronic Engineering Platinum Biotechnology |
| Zdroj: | ACS Photonics. 1:1264-1269 |
| ISSN: | 2330-4022 |
| DOI: | 10.1021/ph500219r |
| Popis: | Nitrogen-doped graphene (NGR) was utilized in dye-sensitized solar cells for energy harvesting. NGR on a Pt-sputtered fluorine-doped tin oxide substrate (NGR/Pt/FTO) as counter electrodes (CEs) achieves the high efficiency of 9.38% via the nitrogen doping into graphene. This is due to (i) the hole-cascading transport at the interface of electrolyte/CEs via controlling the valence band maximum of NGR located between the redox potential of the I–/I– redox couple and the Fermi level of Pt by nitrogen doping, (ii) the extended electron transfer surface effect provided by large-surface-area NGR, (iii) the high charge transfer efficiency due to superior catalytic characteristics of NGR via nitrogen doping, and (iv) the superior light-reflection effect of NGR/Pt/FTO CEs, facilitating the electron transfer from CEs to I3– ions of the electrolyte and light absorption of dye. The result demonstrated that the NGR/Pt hybrid structure is promising in the catalysis field. |
| Databáze: | OpenAIRE |
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