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dc.contributor.authorJanjua, Bilal
dc.contributor.authorNg, Tien Khee
dc.contributor.authorZhao, Chao
dc.contributor.authorPrabaswara, Aditya
dc.contributor.authorConsiglio, Giuseppe Bernardo
dc.contributor.authorPriante, Davide
dc.contributor.authorShen, Chao
dc.contributor.authorElafandy, Rami T.
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorAlhamoud, Abdullah A.
dc.contributor.authorAlatawi, Abdullah A.
dc.contributor.authorYang, Yang
dc.contributor.authorAlyamani, Ahmed Y.
dc.contributor.authorEl-Desouki, Munir M.
dc.contributor.authorOoi, Boon S.
dc.date.accessioned2017-01-02T09:28:34Z
dc.date.available2017-01-02T09:28:34Z
dc.date.issued2016-10-25
dc.identifier.citationJanjua B, Ng TK, Zhao C, Prabaswara A, Consiglio GB, et al. (2016) True Yellow Light-Emitting Diodes as Phosphor for Tunable Color-Rendering Index Laser-Based White Light. ACS Photonics 3: 2089–2095. Available: http://dx.doi.org/10.1021/acsphotonics.6b00457.
dc.identifier.issn2330-4022
dc.identifier.issn2330-4022
dc.identifier.doi10.1021/acsphotonics.6b00457
dc.identifier.urihttp://hdl.handle.net/10754/622490
dc.description.abstractAn urgent challenge for the lighting research community is the lack of efficient optical devices emitting in between 500 and 600 nm, resulting in the “green-yellow gap”. In particular, true green (∼555 nm) and true yellow (∼590 nm), along with blue and red, constitute four technologically important colors. The III-nitride material system, being the most promising choice of platform to bridge this gap, still suffers from high dislocation density and poor crystal quality in realizing high-power, efficient devices. Particularly, the high polarization fields in the active region of such 2D quantum confined structures prevent efficient recombination of carriers. Here we demonstrate a true yellow nanowire (NW) light emitting diode (LED) with peak emission of 588 nm at 29.5 A/cm2 (75 mA in a 0.5 × 0.5 mm2 device) and a low turn-on voltage of ∼2.5 V, while having an internal quantum efficiency of 39%, and without “efficiency droop” up to an injection current density of 29.5 A/cm2. By mixing yellow light from a NW LED in reflective configuration with that of a red, green, and blue laser diode (LD), white light with a correlated color temperature of ∼6000 K and color-rendering index of 87.7 was achieved. The nitride-NW-based device offers a robust, long-term stability for realizing yellow light emitters for tunable color-rendering index solid-state lighting, on a scalable, low-cost, foundry-compatible titanium/silicon substrate, suitable for industry uptake.
dc.description.sponsorshipWe acknowledge the financial support from King Abdulaziz City for Science and Technology (KACST), Grant No. KACST TIC R2-FP-008. This work is partially supported by King Abdullah University of Science and Technology (KAUST) baseline funding, BAS/1/1614-01-01.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/full/10.1021/acsphotonics.6b00457
dc.subjectlight-emitting diode
dc.subjectmolecular beam epitaxy
dc.subjectnanowire
dc.subjectsolid-state lighting
dc.subjecttitanium
dc.subjectvisible laser
dc.subjectyellow
dc.titleTrue Yellow Light-Emitting Diodes as Phosphor for Tunable Color-Rendering Index Laser-Based White Light
dc.typeArticle
dc.contributor.departmentElectron Microscopy
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentPhysical Characterization
dc.identifier.journalACS Photonics
dc.contributor.institutionPhotonics Laboratory
dc.contributor.institutionNational Center for Nanotechnology, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442-6086, Saudi Arabia
kaust.personAnjum, Dalaver H.
kaust.personYang, Yang
kaust.grant.numberBAS/1/1614-01-01
dc.date.published-online2016-10-25
dc.date.published-print2016-11-16


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