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Article: Polychromatic light-emitting diodes with a fluorescent nanosphere opal coating

TitlePolychromatic light-emitting diodes with a fluorescent nanosphere opal coating
Authors
Issue Date2008
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nano
Citation
Nanotechnology, 2008, v. 19 n. 35 How to Cite?
AbstractA hexagonally close-packed array consisting of fluorescent nanospheres was coated onto short-wavelength GaN light-emitting diodes to demonstrate polychromatic white light emission. The spherical particles self-assemble into ordered three-dimensional opal structures, performing the role of color conversion to generate a polychromatic spectrum with smooth and uniform emission patterns. Different ratios of green and orange-red fluorescent nanospheres were mixed and coated onto high-extraction-efficiency micro-LEDs. Four devices with different shades of white emission were demonstrated. Device A, with a high content of orange-red nanospheres, offers the highest CRI value of 80, whereas device C with a well-balanced ratio of green and orange-red nanospheres exhibits color characteristics closest to ideal white with CIE coordinate at (0.34, 0.34). At 20 mA driving current, the luminous efficacy of the devices A, B, C, and D are 40.5 lm W-1, 57.7 lm W-1, 63.1 lm W -1, and 67.2 lm W-1 respectively, while the correlated color temperatures (CCTs) of the corresponding devices are 3587, 4778, 5271, and 13 000 K. © IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/58819
ISSN
2015 Impact Factor: 3.573
2015 SCImago Journal Rankings: 1.196
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHui, KNen_HK
dc.contributor.authorFu, WYen_HK
dc.contributor.authorNg, WNen_HK
dc.contributor.authorLeung, CHen_HK
dc.contributor.authorLai, PTen_HK
dc.contributor.authorWong, KKYen_HK
dc.contributor.authorChoi, HWen_HK
dc.date.accessioned2010-05-31T03:37:28Z-
dc.date.available2010-05-31T03:37:28Z-
dc.date.issued2008en_HK
dc.identifier.citationNanotechnology, 2008, v. 19 n. 35en_HK
dc.identifier.issn0957-4484en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58819-
dc.description.abstractA hexagonally close-packed array consisting of fluorescent nanospheres was coated onto short-wavelength GaN light-emitting diodes to demonstrate polychromatic white light emission. The spherical particles self-assemble into ordered three-dimensional opal structures, performing the role of color conversion to generate a polychromatic spectrum with smooth and uniform emission patterns. Different ratios of green and orange-red fluorescent nanospheres were mixed and coated onto high-extraction-efficiency micro-LEDs. Four devices with different shades of white emission were demonstrated. Device A, with a high content of orange-red nanospheres, offers the highest CRI value of 80, whereas device C with a well-balanced ratio of green and orange-red nanospheres exhibits color characteristics closest to ideal white with CIE coordinate at (0.34, 0.34). At 20 mA driving current, the luminous efficacy of the devices A, B, C, and D are 40.5 lm W-1, 57.7 lm W-1, 63.1 lm W -1, and 67.2 lm W-1 respectively, while the correlated color temperatures (CCTs) of the corresponding devices are 3587, 4778, 5271, and 13 000 K. © IOP Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nanoen_HK
dc.relation.ispartofNanotechnologyen_HK
dc.titlePolychromatic light-emitting diodes with a fluorescent nanosphere opal coatingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0957-4484&volume=19&spage=355203&epage=&date=2008&atitle=Polychromatic+Light-emitting+Diodes+with+a+Fluorescent+Nanosphere+Opal+Coatingen_HK
dc.identifier.emailLeung, CH:chleung@eee.hku.hken_HK
dc.identifier.emailLai, PT:laip@eee.hku.hken_HK
dc.identifier.emailWong, KKY:kywong@eee.hku.hken_HK
dc.identifier.emailChoi, HW:hwchoi@eee.hku.hken_HK
dc.identifier.authorityLeung, CH=rp00146en_HK
dc.identifier.authorityLai, PT=rp00130en_HK
dc.identifier.authorityWong, KKY=rp00189en_HK
dc.identifier.authorityChoi, HW=rp00108en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0957-4484/19/35/355203en_HK
dc.identifier.scopuseid_2-s2.0-48249103970en_HK
dc.identifier.hkuros146764en_HK
dc.identifier.hkuros149438-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-48249103970&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume19en_HK
dc.identifier.issue35en_HK
dc.identifier.isiWOS:000257843900003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHui, KN=12139840100en_HK
dc.identifier.scopusauthoridFu, WY=24481323900en_HK
dc.identifier.scopusauthoridNg, WN=23486567300en_HK
dc.identifier.scopusauthoridLeung, CH=7402612415en_HK
dc.identifier.scopusauthoridLai, PT=7202946460en_HK
dc.identifier.scopusauthoridWong, KKY=36456599700en_HK
dc.identifier.scopusauthoridChoi, HW=7404334877en_HK

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