Dye-sensitized solar cells based on nanocrystalline TiO2 films surface treated with Al3+ ions: Photovoltage and electron transport studies
Nanocrystalline TiO2 films, surface modified with Al3+, were manufactured by depositing a TiO2 suspension containing small amounts of aluminum nitrate or aluminum chloride onto conducting glass substrates, followed by drying, compression, and finally heating to 530 °C. Electrodes prepared with TiO2...
| Autores: | , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2006 |
| País: | Perú |
| Recursos: | Instituto Peruano de Energía Nuclear |
| Repositorio: | IPEN-Institucional |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ipen.gob.pe:20.500.13054/456 |
| Acesso em linha: | https://hdl.handle.net/20.500.13054/456 |
| Access Level: | acceso abierto |
| Palavra-chave: | Células fotovoltaicas Óxidos de titanio Células solares Óxidos de aluminio |
| Resumo: | Nanocrystalline TiO2 films, surface modified with Al3+, were manufactured by depositing a TiO2 suspension containing small amounts of aluminum nitrate or aluminum chloride onto conducting glass substrates, followed by drying, compression, and finally heating to 530 °C. Electrodes prepared with TiO2 nanoparticles coated with less than 0.3 wt % aluminum oxide with respect to TiO2 improved the efficiency of the dye sensitized solar cell. This amount corresponds to less than a monolayer of aluminum oxide. Thus, the Al ions terminate the TiO2 surface rather than form a distinct aluminum oxide layer. The aluminum ion surface treatment affects the solar cell in different ways: the potential of the conduction band is shifted, the electron lifetime is increased, and the electron transport is slower when aluminum ions are present between interconnected TiO2 particles. |
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