Effect of the Nature of Cadmium Salts on the Effectiveness of CdS SILAR Deposition and Its Consequences on the Performance of Sensitized Solar Cells
| Autor: | Lamprini Sygellou, Anastasios Travlos, Stavroula Sfaelou, Vassilios Dracopoulos, Panagiotis Lianos |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Cadmium
Chemistry Band gap Inorganic chemistry chemistry.chemical_element Nanoparticle Nanocrystalline material Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy Adsorption Cadmium nitrate Physical and Theoretical Chemistry Ultraviolet photoelectron spectroscopy Cadmium acetate |
| Zdroj: | The Journal of Physical Chemistry C. 118:22873-22880 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp505787z |
| Popis: | Nanocrystalline titania films deposited on FTO transparent electrodes were sensitized by CdS nanoparticles synthesized in situ by the SILAR method. Three precursor solutions were employed for adsorption of Cd2+ ions: nitrate, sulfate, and acetate. The CdS load and the size of CdS nanoparticles varied a lot from one precursor to the other. The highest load and the largest nanoparticles were obtained in the case of cadmium acetate, the smallest in the case of nitrate, while sulfate gave intermediate values. Ultraviolet photoelectron spectroscopy was employed to measure the ionization potential (and valence band potential) for pure titania and for sensitized titania in the three cases. The obtained values were 7.4 eV for pure titania and 6.7, 6.6, and 5.7 eV for CdS-sensitized titania made by using cadmium nitrate, sulfate, and acetate precursors, respectively. The corresponding band gap values ranged between 2.5 and 2.3 eV. The thus characterized photoanodes were employed to make Quantum Dot Sensitized Sola... |
| Databáze: | OpenAIRE |
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