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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201905951
|2 doi
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|a pubmed24n1011.xml
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|a eng
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|a Huang, Ping
|e verfasserin
|4 aut
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|a Nano Wave Plates Structuring and Index Matching in Transparent Hydroxyapatite-YAG
|b Ce Composite Ceramics for High Luminous Efficiency White Light-Emitting Diodes
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 07.01.2020
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Replacing traditional luminous silicone or resins with phosphor in ceramics (PiCs) as color converters has been proposed as an efficient way to improve thermal stability of high-power white light-emitting diodes (WLEDs). However, excessive light scattering in existing PiCs results in enormous phosphor-converted light losses, which makes the luminosity of current PiCs color converters less efficient and means that they can only be used in devices working in reflective mode. By introducing nano wave plate structuring and Rayleigh scattering, luminous hydroxyapatite (HA)-YAG: Ce ceramics are prepared from mesoporous HA nanorods and YAG: Ce phosphors at 850 °C, enabling for the first time WLEDs equipped with PiC color converters in transmission mode. With low-temperature sintering and a highly transparent matrix, the quantum yield of HA-YAG: Ce retains ≈90% of the raw phosphor, and WLEDs with the color converters exhibit a record luminous efficiency of 170 lm W-1 and a correlated color temperature below 4500 K. A facile and practical strategy of using nano structural modulation to eliminate birefringence-induced light scattering for fabricating high-performance ceramic converters suitable for multiple mode luminaires is demonstrated
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|a Journal Article
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|a ceramic color converters
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|a high-power WLEDs
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|a hydroxyapatite
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|a nano wave plates
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|a transparent ceramics
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|a Zhou, Beiying
|e verfasserin
|4 aut
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|a Zheng, Qi
|e verfasserin
|4 aut
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|a Tian, Yuan
|e verfasserin
|4 aut
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|a Wang, Mengmeng
|e verfasserin
|4 aut
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|a Wang, Lianjun
|e verfasserin
|4 aut
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|a Li, Jianlin
|e verfasserin
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|a Jiang, Wan
|e verfasserin
|4 aut
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 1 vom: 22. Jan., Seite e1905951
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|x 1521-4095
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|g volume:32
|g year:2020
|g number:1
|g day:22
|g month:01
|g pages:e1905951
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|u http://dx.doi.org/10.1002/adma.201905951
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