Studies on the optical and photoelectric properties of anthocyanin and chlorophyll as natural co-sensitizers in dye sensitized solar cell
| Autor: | Shou-Dong Xie, Gang Wang, Hui Nan, Gui-Jun Yang, Hong Lin, Heping Shen |
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| Rok vydání: | 2017 |
| Předmět: |
02 engineering and technology
Electrolyte 010402 general chemistry Photochemistry Electrochemistry 01 natural sciences law.invention Inorganic Chemistry chemistry.chemical_compound Adsorption law Solar cell Electrical and Electronic Engineering Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Absorption (electromagnetic radiation) Spectroscopy Chemistry Organic Chemistry food and beverages 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Dye-sensitized solar cell Chlorophyll 0210 nano-technology |
| Zdroj: | Optical Materials. 73:172-178 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2017.07.036 |
| Popis: | Anthocyanin and Chlorophyll extracted from Troll flower and Cypress leaf respectively are used as natural sensitizers in dye sensitized solar cells (DSCs), with their optical and electrochemical properties investigated. UV–Vis absorption measurement showed that the mixture of two dyes enabled an enhanced and wider absorption in the wavelength range of 300 nm–700 nm compared to each single dye. FTIR results proved that anthocyanin is chemically adsorbed onto the TiO 2 film, while it is physical adsorption for chlorophyll. The energy level offsets on the TiO 2 /dye/electrolyte interface for each dye and the dye mixture with different ratios were calculated from the electrochemical analysis, which affect the electron injection and dye regeneration efficiencies. The optimized ratio of the two dyes in the mixture was found to be ∼2:5, inducing both sufficient charge transfer driving force and minimal energy loss. By incorporating this mixture into the solar cell as co-adsorbing sensitizer, the photovoltaic performance was prominently improved compared with the single dye sensitization system. |
| Databáze: | OpenAIRE |
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