ESTUDIO DE UN RECUBRIMIENTO DE NANOPARTÍCULAS DE SILICIO BASADO EN EL PROCESO DE CONVERSIÓN DESCENDENTE PARA EL INCREMENTO DE LA EFICIENCIA DE UNA CELDA SOLAR DE SILICIO POLICRISTALINO (STUDY OF A SILICON NANOPARTICLE COATING BASED ON THE DOWNSHIFTING PROCESS TO INCREASE THE EFFICIENCY OF A POLYCRYSTALLINE SILICON SOLAR CELL)
Resumen
En el presente trabajo de investigación se expone el estudio de un recubrimiento de nanopartículas de silicio con el cual se busca mejorar la eficiencia de celdas solares de silicio policristalino mediante el proceso de conversión descendente (downshifting) para aprovechar energía desperdiciada en forma de calor.
Como producto de la síntesis, se obtuvo un recubrimiento para celdas solares de NPs-Si con un tamaño de 2 nm. Adicionalmente, se reportan la transmitancia de las nanopartículas de silicio en un rango desde 300 nm hasta 800 nm y su ancho de banda prohibida estimada en 2.88 eV. Finalmente, la caracterización eléctrica de celdas solares policristalinas mejoradas a través del recubrimiento de NPs-Si es analizado.
Como resultado principal, una celda solar comercial y cubierta con las nanopartículas mejoró su eficiencia total de 6.08% a un 6.73% lo que arroja un incremento del 10.69% en la eficiencia total de la celda, demostrando la capacidad de recubrimiento de conversión descendente basado en nanopartículas de silicio.
Palabras clave: Celdas solares, nanopartículas, silicio.
Abstract
In this research work, the study of a coating of silicon nanoparticles is exposed with which it is sought to improve the efficiency of polycrystalline silicon solar cells through the process of downward conversion (downshifting) to take advantage of wasted energy in the form of heat.
As a product of the synthesis, a coating for NPs-Si solar cells with a size of 2 nm was obtained. Additionally, the transmittance of silicon nanoparticles in a range from 300nm to 800nm and their bandwidth estimated at 2.88eV are reported. Finally, the electrical characterization of polycrystalline solar cells improved through NPs-Si coating is analyzed.
As a main result, a commercial solar cell covered with the nanoparticles improved its overall efficiency from 6.08% to 6.73% which yields a 10.69% increase, demonstrating the ability of down-conversion coating based on silicon nanoparticles.
Keywords: Nanoparticles, silicon, Solar cells.
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