Study of photoluminescent properties of layer and bilayer arrays with SiO₂ and TiO₂ nanospheres
It is currently known that nanoparticle arrays with silica and titania allow a decrease in reflected light, furthermore, these type of structures allows the possibility of being used in flexible materials. One of the advantages of these type of structures is their easy manipulation, since, trough de...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2022 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/2333 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2333 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Inspec/Fotoluminiscencia info:eu-repo/classification/Inspec/Reflectancia info:eu-repo/classification/Inspec/Nanopartículas info:eu-repo/classification/Inspec/Titania info:eu-repo/classification/Inspec/Silica info:eu-repo/classification/Inspec/Tratamiento térmico info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 |
| Sumario: | It is currently known that nanoparticle arrays with silica and titania allow a decrease in reflected light, furthermore, these type of structures allows the possibility of being used in flexible materials. One of the advantages of these type of structures is their easy manipulation, since, trough deposition with spin coating techniques, uniform distribution can be made on the substrates, making it an attractive alternative to reduce resources in the fabrication of nanoparticle-based devices. However, the photoluminescence emission properties of silica and titania in their intrinsic form are not suitable to be efficiently used in conventional silicon solar cells. Therefore, the present work it was experimentally studied the way to improve the photoluminescence emission of these nanomaterials (Silica spheres of 600 nm diameter and Titania almost spheres of 100 nm diameter) using thermal treatment techniques, as well as the time of execution of the treatment. Three types of nanoparticles arrays were studied: Titania-Silica, Silica-Titania, and Silica nanoparticles bilayer arrays, and two more were used as reference samples: Silica and Titania NPs monolayer. Different arrays were used to focus and guides the incident light into the nanoparticles arrays while the lower part with this irregular shape maximize the scattering improving a coupling light absorption of incident light. Thus, after optimizing the thermo-temporal parameters the better experimental results were applied to c-Si solar cells. Positive results were achieved, nanoparticles bilayer arrays increased their photoluminescent properties after thermal annealing at short times. However, preliminary results shown that nanoparticles bilayer array applied over c-Si solar cells increases their current density for some thermal parameters (400 ºC and 500 ºC for 10 and 30 min, respectively) and decrease it in other cases. |
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