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Abstract
Even though CaAlSiN3:Eu2+ (CASN) is, in many regards, a highly suitable red phosphor that can be used in white light-emitting diodes, it can hardly be used in high-power laser-lighting because of its low saturation-threshold. By using CASN-based composite ceramics, it is possible to increase the threshold but new difficulties appear. These include complex and expensive synthesis, while the saturation-threshold still has room for improvement. In this study, we prepare a CASN/glass composite film, using an industry-friendly blade-coating method. The film has a high internal quantum efficiency of 79%, which suggests low conversion loss. Under 1.17 W blue laser excitation, a high luminous efficacy of 21.0 lm/W can be obtained. More importantly, the composite film shows a record-high saturation-threshold of more than 12.7 W (∼320 W/cm2) blue laser excitation. With these outstanding properties, CASN/glass composite films may open doors towards commercially viable red color converters for high-power laser-lighting applications.
Original language | English |
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Journal | Journal of the European Ceramic Society |
Volume | 40 |
Pages (from-to) | 4704-4708 |
ISSN | 0955-2219 |
DOIs | |
Publication status | Published - 1 Jan 2020 |
Keywords
- Blade-coating
- CaAlSiN:Eu
- Composite film
- High-power laser-lighting
- Red phosphor
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Dive into the research topics of 'Design of a CaAlSiN3:Eu/glass composite film: Facile synthesis, high saturation-threshold and application in high-power laser lighting'. Together they form a unique fingerprint.Projects
- 1 Finished
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SpotLASE: Energy Efficient Laser Enhancement of Stage Spotlights
Dam-Hansen, C. (Project Manager), Thorseth, A. (Project Participant), Jensen, O. B. (Project Participant), Lindén, J. (Project Participant) & Corell, D. D. (Project Participant)
01/10/2017 → 31/03/2021
Project: Research