Genetic algorithms used for the optimization of light-emitting diodes and solar thermal collectors

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Résumé

We present a genetic algorithm (GA) we developed for the optimization of light-emitting diodes (LED) and solar thermal collectors. The surface of a LED can be covered by periodic structures whose geometrical and material parameters must be adjusted in order to maximize the extraction of light. The optimization of these parameters by the GA enabled us to get a light-extraction efficiency η of 11.0% from a GaN LED (for comparison, the flat material has a light-extraction efficiency η of only 3.7%). The solar thermal collector we considered consists of a waffle-shaped Al substrate with NiCrOx and SnO2 conformal coatings. We must in this case maximize the solar absorption α while minimizing the thermal emissivity ? in the infrared. A multi-objective genetic algorithm has to be implemented in this case in order to determine optimal geometrical parameters. The parameters we obtained using the multi-objective GA enable α~97.8% and ε~4.8%, which improves results achieved previously when considering a flat substrate. These two applications demonstrate the interest of genetic algorithms for addressing complex problems in physics.

langue originaleAnglais
titreProceedings of SPIE - The International Society for Optical Engineering
EditeurSPIE
Nombre de pages10
Volume9187
ISBN (imprimé)9781628412147
Les DOIs
Etat de la publicationPublié - 2014
EvénementThe Nature of Light: Light in Nature V - San Diego, États-Unis
Durée: 18 août 2014 → …

Une conférence

Une conférenceThe Nature of Light: Light in Nature V
PaysÉtats-Unis
La villeSan Diego
période18/08/14 → …

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