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- Publisher Website: 10.1088/0957-4484/19/35/355203
- Scopus: eid_2-s2.0-48249103970
- PMID: 21828836
- WOS: WOS:000257843900003
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Article: Polychromatic light-emitting diodes with a fluorescent nanosphere opal coating
Title | Polychromatic light-emitting diodes with a fluorescent nanosphere opal coating |
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Authors | |
Issue Date | 2008 |
Publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nano |
Citation | Nanotechnology, 2008, v. 19 n. 35, article no. 355203 How to Cite? |
Abstract | A 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. |
Persistent Identifier | http://hdl.handle.net/10722/58819 |
ISSN | 2023 Impact Factor: 2.9 2023 SCImago Journal Rankings: 0.631 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Hui, KN | en_HK |
dc.contributor.author | Fu, WY | en_HK |
dc.contributor.author | Ng, WN | en_HK |
dc.contributor.author | Leung, CH | en_HK |
dc.contributor.author | Lai, PT | en_HK |
dc.contributor.author | Wong, KKY | en_HK |
dc.contributor.author | Choi, HW | en_HK |
dc.date.accessioned | 2010-05-31T03:37:28Z | - |
dc.date.available | 2010-05-31T03:37:28Z | - |
dc.date.issued | 2008 | en_HK |
dc.identifier.citation | Nanotechnology, 2008, v. 19 n. 35, article no. 355203 | en_HK |
dc.identifier.issn | 0957-4484 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/58819 | - |
dc.description.abstract | A 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. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nano | en_HK |
dc.relation.ispartof | Nanotechnology | en_HK |
dc.title | Polychromatic light-emitting diodes with a fluorescent nanosphere opal coating | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Leung, CH:chleung@eee.hku.hk | en_HK |
dc.identifier.email | Lai, PT:laip@eee.hku.hk | en_HK |
dc.identifier.email | Wong, KKY:kywong@eee.hku.hk | en_HK |
dc.identifier.email | Choi, HW:hwchoi@eee.hku.hk | en_HK |
dc.identifier.authority | Leung, CH=rp00146 | en_HK |
dc.identifier.authority | Lai, PT=rp00130 | en_HK |
dc.identifier.authority | Wong, KKY=rp00189 | en_HK |
dc.identifier.authority | Choi, HW=rp00108 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1088/0957-4484/19/35/355203 | en_HK |
dc.identifier.pmid | 21828836 | - |
dc.identifier.scopus | eid_2-s2.0-48249103970 | en_HK |
dc.identifier.hkuros | 146764 | en_HK |
dc.identifier.hkuros | 149438 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-48249103970&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 19 | en_HK |
dc.identifier.issue | 35 | en_HK |
dc.identifier.spage | article no. 355203 | - |
dc.identifier.epage | article no. 355203 | - |
dc.identifier.isi | WOS:000257843900003 | - |
dc.publisher.place | United Kingdom | en_HK |
dc.identifier.scopusauthorid | Hui, KN=12139840100 | en_HK |
dc.identifier.scopusauthorid | Fu, WY=24481323900 | en_HK |
dc.identifier.scopusauthorid | Ng, WN=23486567300 | en_HK |
dc.identifier.scopusauthorid | Leung, CH=7402612415 | en_HK |
dc.identifier.scopusauthorid | Lai, PT=7202946460 | en_HK |
dc.identifier.scopusauthorid | Wong, KKY=36456599700 | en_HK |
dc.identifier.scopusauthorid | Choi, HW=7404334877 | en_HK |
dc.identifier.issnl | 0957-4484 | - |