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dc.contributor.authorTsai, Yu-Lin
dc.contributor.authorLiu, Che-Yu
dc.contributor.authorKrishnan, Chirenjeevi
dc.contributor.authorLin, Da-Wei
dc.contributor.authorChu, You-Chen
dc.contributor.authorChen, Tzu-Pei
dc.contributor.authorShen, Tien-Lin
dc.contributor.authorKao, Tsung-Sheng
dc.contributor.authorCharlton, Martin
dc.contributor.authorYu, Peichen
dc.contributor.authorLin, Chien-Chung
dc.contributor.authorKuo, Hao-Chung
dc.contributor.authorHe, Jr-Hau
dc.date.accessioned2015-12-08T13:35:34Z
dc.date.available2015-12-08T13:35:34Z
dc.date.issued2016
dc.identifier.citationBridging “green gap” of LEDs: Giant light output enhancement and directional control of LEDs via embedded nano-void photonic crystals 2015 Nanoscale
dc.identifier.issn2040-3364
dc.identifier.issn2040-3372
dc.identifier.pmid26666367
dc.identifier.doi10.1039/C5NR05555E
dc.identifier.urihttp://hdl.handle.net/10754/583403
dc.description.abstractGreen LEDs do not show the same level of performance as their blue and red cousins, greatly hindering the solid-state lighting development, which is so-called “green gap”. In this work, nano-void photonic crystals (NVPCs) were fabricated to embed within the GaN/InGaN green LEDs by using epitaxial lateral overgrowth (ELO) and nano-sphere lithography techniques. The NVPCs act as an efficient scattering back-reflector to outcouple the guided and downward photons, which not only boosting light extraction efficiency of LEDs with an enhancement of 78% but also collimating the view angle of LEDs from 131.5゜to 114.0゜. This could be because the highly scattering nature of NVPCs which reduce the interference giving rise to Fabry-Perot resonance. Moreover, due to the threading dislocation suppression and strain relief by the NVPCs, the internal quantum efficiency was increased by 25% and droop behavior was reduced from 37.4% to 25.9%. The enhancement of light output power can be achieved as high as 151% at a driving current of 350 mA. Giant light output enhancement and directional control via NVPCs points the way towards a promising avenue of solid-state lighting.
dc.language.isoen
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/NR/C5NR05555E
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Nanoscale, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.rsc.org/en/Content/ArticleLanding/2015/NR/C5NR05555E.
dc.titleBridging “green gap” of LEDs: Giant light output enhancement and directional control of LEDs via embedded nano-void photonic crystals
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.identifier.journalNanoscale
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Photonics & Institute of Electro - Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, ROC
dc.contributor.institutionSchool of Electronics and Computer Science , University of Southampton, Southampton SO17 1BJ, United Kingdom
dc.contributor.institutionInstitute of Photonic System, National Chiao Tung University, Tainan 711, Taiwan, ROC
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personTsai, Yu-Lin
kaust.personHe, Jr-Hau
refterms.dateFOA2016-11-23T00:00:00Z


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