Modification of fluorine-doped tin oxide-electrodes by electrochemical reduction of di(4-nitrophenyl)iodonium tetrafluoroborate - And its application as a photo-anode in dye-sensitized solar cells
| Autor: | Lars A. Sørensen, Torben Lund, Cathrine D. Christiansen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Tetrafluoroborate
Chemistry General Chemical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Tin oxide 01 natural sciences 0104 chemical sciences Analytical Chemistry Anode Dye-sensitized solar cell chemistry.chemical_compound Ferrocene Electrode Nitro 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Electroanalytical Chemistry. 809:44-51 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2017.12.050 |
| Popis: | We report on a straightforward methodology to cover the FTO layer of the DSC photo anode with an insulating layer of nitro phenyl groups by electrochemical reduction of di(4-nitrophenyl)-iodonium tetrafluoroborate 1. The efficiency of the blocking layer was demonstrated by a ferrocene CV test, in which ferrocene CV peak separations increased from 200 to 400 mV, and in which the charge transfer resistance measured by EIS increased from 600 to 20.000 Ω depending on the number of grafting CV scans. Our DSCs displayed a Voc increase of 182 mV at 90 W/m2 corresponding to a reduction in the dark current with a factor of 1000, when using D5 as sensitizing dye, [Co(bipy)3]2 +/3 + as mediator, and FTO│TiO2 as an electrode that had been grafted before by three CV scans of 1. However, DSCs prepared with N719 and D35 as dyes and using FTO│TiO2 as photoanode grafted with 1 showed decreased performance on all cell parameters. |
| Databáze: | OpenAIRE |
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