Light extraction enhancement for light-emitting diodes: a firefly-inspired structure refined by the genetic algorithm: A firefly-inspired structure refined by the genetic algorithm

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Résumé

The efficiency of light-emitting diodes (LED) has increased significantly over the past few years, but the overall efficiency is still limited by total internal reflections due to the high dielectric-constant contrast between the incident and emergent media. The bioluminescent organ of fireflies gave incentive for light-extraction enhancement studies. A specific factory-roof shaped structure was shown, by means of light-propagation simulations and measurements, to enhance light extraction significantly. In order to achieve a similar effect for light-emitting diodes, the structure needs to be adapted to the specific set-up of LEDs. In this context simulations were carried out to determine the best geometrical parameters. In the present work, the search for a geometry that maximizes the extraction of light has been conducted by using a genetic algorithm. The idealized structure considered previously was generalized to a broader variety of shapes. The genetic algorithm makes it possible to search simultaneously over a wider range of parameters. It is also significantly less time-consuming than the previous approach that was based on a systematic scan on parameters. The results of the genetic algorithm show that (1) the calculations can be performed in a smaller amount of time and (2) the light extraction can be enhanced even more significantly by using optimal parameters determined by the genetic algorithm for the generalized structure. The combination of the genetic algorithm with the Rigorous Coupled Waves Analysis method constitutes a strong simulation tool, which provides us with adapted designs for enhancing light extraction from light-emitting diodes.

langue originaleAnglais
titreProceedings of SPIE - The International Society for Optical Engineering
EditeurSPIE
Nombre de pages8
Volume9187
ISBN (imprimé)9781628412147
Les DOIs
étatPublié - 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 → …

Empreinte digitale

fireflies
Diode
genetic algorithms
Light emitting diodes
light emitting diodes
Enhancement
Genetic algorithms
Genetic Algorithm
augmentation
Total Internal Reflection
Light propagation
Dielectric Constant
incentives
Optimal Parameter
Simulation Tool
Incentives
simulation
roofs
Roofs
Industrial plants

Citer ceci

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title = "Light extraction enhancement for light-emitting diodes: a firefly-inspired structure refined by the genetic algorithm: A firefly-inspired structure refined by the genetic algorithm",
abstract = "The efficiency of light-emitting diodes (LED) has increased significantly over the past few years, but the overall efficiency is still limited by total internal reflections due to the high dielectric-constant contrast between the incident and emergent media. The bioluminescent organ of fireflies gave incentive for light-extraction enhancement studies. A specific factory-roof shaped structure was shown, by means of light-propagation simulations and measurements, to enhance light extraction significantly. In order to achieve a similar effect for light-emitting diodes, the structure needs to be adapted to the specific set-up of LEDs. In this context simulations were carried out to determine the best geometrical parameters. In the present work, the search for a geometry that maximizes the extraction of light has been conducted by using a genetic algorithm. The idealized structure considered previously was generalized to a broader variety of shapes. The genetic algorithm makes it possible to search simultaneously over a wider range of parameters. It is also significantly less time-consuming than the previous approach that was based on a systematic scan on parameters. The results of the genetic algorithm show that (1) the calculations can be performed in a smaller amount of time and (2) the light extraction can be enhanced even more significantly by using optimal parameters determined by the genetic algorithm for the generalized structure. The combination of the genetic algorithm with the Rigorous Coupled Waves Analysis method constitutes a strong simulation tool, which provides us with adapted designs for enhancing light extraction from light-emitting diodes.",
keywords = "Firefly, Genetic algorithm, Light extraction, Light-emitting diode (LED), Optimization",
author = "Annick Bay and Alexandre Mayer",
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language = "English",
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Bay, A & Mayer, A 2014, Light extraction enhancement for light-emitting diodes: a firefly-inspired structure refined by the genetic algorithm: A firefly-inspired structure refined by the genetic algorithm. Dans Proceedings of SPIE - The International Society for Optical Engineering. VOL. 9187, 918706, SPIE, The Nature of Light: Light in Nature V, San Diego, États-Unis, 18/08/14. https://doi.org/10.1117/12.2060797

Light extraction enhancement for light-emitting diodes: a firefly-inspired structure refined by the genetic algorithm : A firefly-inspired structure refined by the genetic algorithm. / Bay, Annick; Mayer, Alexandre.

Proceedings of SPIE - The International Society for Optical Engineering. Vol 9187 SPIE, 2014. 918706.

Résultats de recherche: Contribution dans un livre/un catalogue/un rapport/dans les actes d'une conférenceArticle dans les actes d'une conférence/un colloque

TY - GEN

T1 - Light extraction enhancement for light-emitting diodes: a firefly-inspired structure refined by the genetic algorithm

T2 - A firefly-inspired structure refined by the genetic algorithm

AU - Bay, Annick

AU - Mayer, Alexandre

PY - 2014

Y1 - 2014

N2 - The efficiency of light-emitting diodes (LED) has increased significantly over the past few years, but the overall efficiency is still limited by total internal reflections due to the high dielectric-constant contrast between the incident and emergent media. The bioluminescent organ of fireflies gave incentive for light-extraction enhancement studies. A specific factory-roof shaped structure was shown, by means of light-propagation simulations and measurements, to enhance light extraction significantly. In order to achieve a similar effect for light-emitting diodes, the structure needs to be adapted to the specific set-up of LEDs. In this context simulations were carried out to determine the best geometrical parameters. In the present work, the search for a geometry that maximizes the extraction of light has been conducted by using a genetic algorithm. The idealized structure considered previously was generalized to a broader variety of shapes. The genetic algorithm makes it possible to search simultaneously over a wider range of parameters. It is also significantly less time-consuming than the previous approach that was based on a systematic scan on parameters. The results of the genetic algorithm show that (1) the calculations can be performed in a smaller amount of time and (2) the light extraction can be enhanced even more significantly by using optimal parameters determined by the genetic algorithm for the generalized structure. The combination of the genetic algorithm with the Rigorous Coupled Waves Analysis method constitutes a strong simulation tool, which provides us with adapted designs for enhancing light extraction from light-emitting diodes.

AB - The efficiency of light-emitting diodes (LED) has increased significantly over the past few years, but the overall efficiency is still limited by total internal reflections due to the high dielectric-constant contrast between the incident and emergent media. The bioluminescent organ of fireflies gave incentive for light-extraction enhancement studies. A specific factory-roof shaped structure was shown, by means of light-propagation simulations and measurements, to enhance light extraction significantly. In order to achieve a similar effect for light-emitting diodes, the structure needs to be adapted to the specific set-up of LEDs. In this context simulations were carried out to determine the best geometrical parameters. In the present work, the search for a geometry that maximizes the extraction of light has been conducted by using a genetic algorithm. The idealized structure considered previously was generalized to a broader variety of shapes. The genetic algorithm makes it possible to search simultaneously over a wider range of parameters. It is also significantly less time-consuming than the previous approach that was based on a systematic scan on parameters. The results of the genetic algorithm show that (1) the calculations can be performed in a smaller amount of time and (2) the light extraction can be enhanced even more significantly by using optimal parameters determined by the genetic algorithm for the generalized structure. The combination of the genetic algorithm with the Rigorous Coupled Waves Analysis method constitutes a strong simulation tool, which provides us with adapted designs for enhancing light extraction from light-emitting diodes.

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