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Journal of Photonics for Energy

Optimization of a spectrum splitter using differential evolution algorithm for solar cell applications
Author(s): Li Fan; Muhammad Faryad; Greg Barber; Thomas Mallouk; Peter B. Monk; Akhlesh Lakhtakia
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Paper Abstract

A spectrum splitter can be used to spatially multiplex different solar cells that have high efficiency in mutually exclusive parts of the solar spectrum. We investigated the use of a grating, comprising an array of dielectric cylinders embedded in a dielectric slab, for specularly transmitting one part of the solar spectrum while the other part is transmitted nonspecularly and the total reflectance is very low. A combination of (1) the rigorous coupled-wave approach for computing the reflection and transmission coefficients of the grating and (2) the differential evolution algorithm for optimizing the grating geometry and the refractive indices of dielectric materials was devised as a design tool. We used this tool to optimize two candidate gratings and obtained definite improvements to the initial guesses for the structural and constitutive parameters. Significant spectrum splitting can be achieved if the angle of incidence does not exceed 15 deg.

Paper Details

Date Published: 25 June 2015
PDF: 15 pages
J. Photon. Energy 5(1) 055099 doi: 10.1117/1.JPE.5.055099
Published in: Journal of Photonics for Energy Volume 5, Issue 1
Show Author Affiliations
Li Fan, Univ. of Delaware (United States)
Muhammad Faryad, Pennsylvania State Univ. (United States)
Lahore Univ.of Management Sciences (Pakistan)
Greg Barber, The Pennsylvania State Univ. (United States)
Thomas Mallouk, The Pennsylvania State Univ. (United States)
Peter B. Monk, Univ. of Delaware (United States)
Akhlesh Lakhtakia, The Pennsylvania State Univ. (United States)

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