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- Publisher Website: 10.1109/TED.2012.2228866
- Scopus: eid_2-s2.0-84871739995
- WOS: WOS:000316816200050
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Article: Color-tunable and Phosphor-free White-light Multilayered Light-emitting Diodes
Title | Color-tunable and Phosphor-free White-light Multilayered Light-emitting Diodes |
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Authors | |
Keywords | Color tuning Light-emitting diode (LED) |
Issue Date | 2013 |
Publisher | IEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=16 |
Citation | IEEE Transactions on Electron Devices, 2013, v. 60 n. 1, p. 333-338 How to Cite? |
Abstract | A tightly integrated 3-D RGB light-emitting diode (LED) stack is demonstrated. Chips of identical dimensions are stacked on top of each other, with wire bonds embedded within. This is achieved by integrating laser-micromachined channels onto the sapphire face of InGaN LEDs, serving to accommodate wire bonds from the chip beneath. The resultant structure eliminates leakage of monochromatic light from individual chips, producing optimally mixed emission through the top aperture. The device can emit a wide range of colors and is an efficient phosphor-free white-light LED as well. When emitting at correlated color temperatures (CCTs) of 2362 K, 5999 K, and 7332 K, the device generates ~ 20 lm/W, exhibiting performance invariant of CCT. Thermal characteristics of this multilayered device are investigated via infrared thermometry. |
Persistent Identifier | http://hdl.handle.net/10722/189019 |
ISSN | 2023 Impact Factor: 2.9 2023 SCImago Journal Rankings: 0.785 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Cheung, YF | - |
dc.contributor.author | Choi, HW | - |
dc.date.accessioned | 2013-09-17T14:24:34Z | - |
dc.date.available | 2013-09-17T14:24:34Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | IEEE Transactions on Electron Devices, 2013, v. 60 n. 1, p. 333-338 | - |
dc.identifier.issn | 0018-9383 | - |
dc.identifier.uri | http://hdl.handle.net/10722/189019 | - |
dc.description.abstract | A tightly integrated 3-D RGB light-emitting diode (LED) stack is demonstrated. Chips of identical dimensions are stacked on top of each other, with wire bonds embedded within. This is achieved by integrating laser-micromachined channels onto the sapphire face of InGaN LEDs, serving to accommodate wire bonds from the chip beneath. The resultant structure eliminates leakage of monochromatic light from individual chips, producing optimally mixed emission through the top aperture. The device can emit a wide range of colors and is an efficient phosphor-free white-light LED as well. When emitting at correlated color temperatures (CCTs) of 2362 K, 5999 K, and 7332 K, the device generates ~ 20 lm/W, exhibiting performance invariant of CCT. Thermal characteristics of this multilayered device are investigated via infrared thermometry. | - |
dc.language | eng | - |
dc.publisher | IEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=16 | - |
dc.relation.ispartof | IEEE Transactions on Electron Devices | - |
dc.rights | IEEE Transactions on Electron Devices. Copyright © IEEE. | - |
dc.subject | Color tuning | - |
dc.subject | Light-emitting diode (LED) | - |
dc.title | Color-tunable and Phosphor-free White-light Multilayered Light-emitting Diodes | - |
dc.type | Article | - |
dc.identifier.email | Choi, HW: hwchoi@eee.hku.hk | - |
dc.identifier.authority | Choi, HW=rp00108 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1109/TED.2012.2228866 | - |
dc.identifier.scopus | eid_2-s2.0-84871739995 | - |
dc.identifier.hkuros | 221360 | - |
dc.identifier.volume | 60 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 333 | - |
dc.identifier.epage | 338 | - |
dc.identifier.isi | WOS:000316816200050 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0018-9383 | - |