A numerical study of Bi-periodic binary diffraction gratings for solar cell applications

Mellor Null, Alexander Virgil; Tobías Galicia, Ignacio; Martí Vega, Antonio y Luque López, Antonio (2011). A numerical study of Bi-periodic binary diffraction gratings for solar cell applications. "Solar energy materials and solar cells", v. 95 (n. 12); pp. 3527-3535. ISSN 0927-0248. https://doi.org/10.1016/j.solmat.2011.08.017..

Descripción

Título: A numerical study of Bi-periodic binary diffraction gratings for solar cell applications
Autor/es:
  • Mellor Null, Alexander Virgil
  • Tobías Galicia, Ignacio
  • Martí Vega, Antonio
  • Luque López, Antonio
Tipo de Documento: Artículo
Título de Revista/Publicación: Solar energy materials and solar cells
Fecha: Diciembre 2011
Volumen: 95
Materias:
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Electrónica Física
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In this paper, a numerical study is made of simple bi-periodic binary diffraction gratings for solar cell applications. The gratings consist of hexagonal arrays of elliptical towers and wells etched directly into the solar cell substrate. The gratings are applied to two distinct solar cell technologies: a quantum dot intermediate band solar cell (QD-IBSC) and a crystalline silicon solar cell (SSC). In each case, the expected photocurrent increase due to the presence of the grating is calculated assuming AM1.5D illumination. For each technology, the grating period, well/tower depth and well/tower radii are optimised to maximise the photocurrent. The optimum parameters are presented. Results are presented for QD-IBSCs with a range of quantum dot layers and for SSCs with a range of thicknesses. For the QD-IBSC, it is found that the optimised grating leads to an absorption enhancement above that calculated for an ideally Lambertian scatterer for cells with less than 70 quantum dot layers. In a QD-IBSC with 50 quantum dot layers equipped with the optimum grating, the weak intermediate band to conduction band transition absorbs roughly half the photons in the corresponding sub-range of the AM1.5D spectrum. For the SSC, it is found that the optimised grating leads to an absorption enhancement above that calculated for an ideally Lambertian scatterer for cells with thicknesses of 10 ?m or greater. A 20um thick SSC equipped with the optimised grating leads to an absorption enhancement above that of a 200um thick SSC equipped with a planar back reflector.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
FP7211640IBPOWERSin especificarIntermediate Band Materials and Solar Cells for Photovoltaics with High Efficiency and Reduced Cost

Más información

ID de Registro: 10832
Identificador DC: http://oa.upm.es/10832/
Identificador OAI: oai:oa.upm.es:10832
Identificador DOI: 10.1016/j.solmat.2011.08.017.
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0927024811004752
Depositado por: Memoria Investigacion
Depositado el: 08 May 2012 08:53
Ultima Modificación: 03 Nov 2014 13:17
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