Diseño de absorbedor-emisor selectivo a base de nanotubos de carbono y tungsteno para aplicaciones termo-fotovoltaicas
DOI:
https://doi.org/10.46842/ipn.cien.v28n1a07Palabras clave:
cristal fotónico, emisión foto-termiónica, fotoelectricidadResumen
En esta investigación se formula el diseño de una celda solar termo-fotovoltaica que aumenta la eficiencia energética por medio de un proceso de emisión foto-termiónica. La celda propuesta busca transformar la luz solar en energía eléctrica asistida por un proceso térmico intermedio utilizando materiales nanoestructurados. Nanotubos de carbono alineados verticalmente actuarán como eficientes absorbedores de la luz solar para generar emisión de portadores térmicos y elevar su temperatura. El calor generado se transferirá por conducción a un cristal fotónico de tungsteno con un patrón de crecimiento periódico que emitirá selectivamente un espectro de energía el cual pueda ser absorbido por una celda fotovoltaica. El cambio de temperatura de los nanotubos de carbono, además de excitar al cristal fotónico, servirá para generar una corriente eléctrica por medio del efecto foto-termiónico. La suma de la corriente foto-termiónica a la corriente fotovoltaica aumenta la eficiencia energética de la celda en un 4.8%.
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