A bioinspired dye sensitized solar cell based on a rhodamine-functionalized peptide immobilized on nanocrystalline TiO 2
| Autor: | Manuela Scarselli, M Caruso, Mariano Venanzi, Alessia Quatela, Emanuela Gatto, Simone Casaluci, Aldo Di Carlo, Antonio Palleschi, Piero Morales |
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| Přispěvatelé: | Morales, P. |
| Rok vydání: | 2017 |
| Předmět: |
Circular dichroism
General Chemical Engineering Nanocrystalline TiO2 General Physics and Astronomy 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Peptide material Rhodamine Dye sensitized solar cell Hybrid materials Nanocrystalline TiO2 Peptide materials Photocurrent generation Rhodamine-based chromophore chemistry.chemical_compound Rhodamine-based chromophore Photocurrent generation Dye sensitized solar cell Settore CHIM/02 - Chimica Fisica Hybrid material Photocurrent Chemistry Hybrid materials Peptide materials General Chemistry Chromophore 021001 nanoscience & nanotechnology Fluorescence Nanocrystalline material 0104 chemical sciences Dye-sensitized solar cell 0210 nano-technology |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 347:227-234 |
| ISSN: | 1010-6030 |
| Popis: | A dodecapeptide (AMRKLPDAPGMH) functionalized with a tetramethylrhodamine (TAMRA) chromophore at the N-terminus was immobilized on nanocrystalline TiO2. The optical and binding properties of the peptide layer immobilized on the titania surface were characterized by UV–vis absorption, steady-state fluorescence and X-ray photoelectron spectroscopies. Circular Dichroism experiments and Molecular Mechanics calculations showed that the predominant conformation populated by the peptide scaffold brings Arg3, Lys4 and Asp7 in the correct position for linking the TiO2 surface. Photocurrent generation experiments were therefore carried out to determine the photon-to-current conversion efficiency (IPCE) of a Grätzel-like Dye Sensitized Solar Cell (DSSC), the photoactive unit of which is formed by TAMRA-AMRKLPDAPGMH/TiO2. The measured IPCE amounted to 0.65%, a value that is definitely low, but superior to those previously reported for similar bioinspired DSSCs. This result can be ascribed to the light-harvesting properties of the TAMRA chromophore and to the unique structural properties of the peptide spacer. © 2017 Elsevier B.V. |
| Databáze: | OpenAIRE |
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