Effect of the electrolyte composition on the response of a TIO2|CDS-Based Photoanode
Sulfide solutions are the most widely selected electrolyte for the photoelectrochemical characterization of metal chalcogenide (like CdS and CdSe) based solar cells because its good hole scavenging properties and improved stabilization of the semiconductor sensitizer. However, the photocurrent value...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2014 |
| País: | Argentina |
| Recursos: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositório: | CONICET Digital (CONICET) |
| Idioma: | inglês |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/31491 |
| Acesso em linha: | http://hdl.handle.net/11336/31491 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Sulfide Solar Cell Optical Sensitization Titania Tio2 Photocurrent https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| Resumo: | Sulfide solutions are the most widely selected electrolyte for the photoelectrochemical characterization of metal chalcogenide (like CdS and CdSe) based solar cells because its good hole scavenging properties and improved stabilization of the semiconductor sensitizer. However, the photocurrent values of CdS sensitized TiO2 photoanodes depend on the sodium sulfide analytical concentration and pH values in the electrolyte solution. In this report, we show that the mass transport of the sulfide hole scavenger is the main limiting process and if its concentration is lower than the HO− concentration there is a competition for adsorption sites onto TiO2 surface, decreasing the photocurrent value. A careful optimization of these two variables it is necessary in order to attaining high overall photoelectrochemical cell efficiency. |
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