A unique color converter geometry for laser-driven white lighting
Source abstract
Abstract
Abstract The development of quantum dot (QD) layers as color converters in phosphor-converted white laser diodes (pc-wLDs) is restricted due to their low stability under laser irradiation. The present study aims to develop a unique color converter geometry that enables the QD layer for high-power pc-wLDs. A red emitting QD layer was coated on a thermally stable and heat-conducting Al2O3-YAG:Ce composite ceramic (CC), which played dual role of yellow emitter and heat sink. Thus, thermal and flux pressure on the QD layer has been significantly mitigated. Under irradiation of a 5 W blue laser, the operating temperature for the QD layer was as low as ∼68 °C. Furthermore, the CC-QD color converter and a blue LD were combined to fabricate pc-wLDs, which have exhibited superior color properties in terms of a high color rendering index (∼80), a high wall-plug efficiency (∼91 lm/W). and tunable color temperatures. This indicates the suitability of QD layer for high-power and high color rendering laser lighting.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Quantum Dots Synthesis And Properties · Solid State Laser Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Comparison between blue lasers and light‐emitting diodes for future solid‐state lighting10.1002/lpor.201300048 ↗
2. Origin of efficiency droop in GaN-based light-emitting diodes10.1063/1.2800290 ↗
3. High luminous flux from single crystal phosphor-converted laser-based white lighting system10.1364/OE.24.00A215 ↗
4. Efficiency drop in green InGaN/GaN light emitting diodes: the role of random alloy fluctuations10.1103/PhysRevLett.116.027401 ↗
5. Lighting with laser diodes10.1515/aot-2013-0031 ↗
6. Low etendue yellow-green solid-state light generation by laser-pumped LuAG:Ce ceramic
7. High luminous flux from single crystal phosphor-converted laser-based white lighting system10.1364/OE.24.00A215 ↗
8. Stable, heat-conducting phosphor composites for high-power laser lighting10.1021/acsami.8b00074 ↗
9. Design of laser-driven high-efficiency Al2O3/YAG:Ce3+ ceramic converter for automotive lighting: fabrication, luminous emittance, and tunable color space10.1016/j.dyepig.2016.12.071 ↗
10. Unique color converter architecture enabling phosphor-in-glass (PiG) films suitable for high-power and high-luminance laser-driven white lighting10.1021/acsami.8b03168 ↗
11. Design of laser-driven SiO2-YAG:Ce composite thick film: facile synthesis, robust thermal performance, and application in solid-state laser lighting10.1016/j.optmat.2017.10.049 ↗
12. Design of laser-driven high-efficiency Al2O3/YAG:Ce3+ ceramic converter for automotive lighting: fabrication, luminous emittance, and tunable color space10.1016/j.dyepig.2016.12.071 ↗
13. CaAlSiN3:Eu2+ translucent ceramic: a promising robust and efficient red color converter for solid state laser displays and lighting10.1039/C6TC02518H ↗
14. Hanafi · 2016
15. β-Sialon:Eu phosphor-in-glass: a robust green color converter for high power blue laser lighting10.1039/C5TC02236C ↗
16. Investigation of an LuAG:Ce translucent ceramic synthesized via spark plasma sintering: towards a facile synthetic route, robust thermal performance, and high-power solid state laser lighting10.1016/j.jeurceramsoc.2017.07.036 ↗
17. Down-conversion nitride materials for solid state lighting: recent advances and perspectives10.1021/acs.chemrev.7b00284 ↗
18. Al2O3–YAG:Ce composite phosphor ceramic: a thermally robust and efficient color converter for solid state laser lighting10.1039/C6TC03215J ↗
19. Strong thermal stability of Lu3Al5O12:Ce3+ single crystal phosphor for laser lighting10.1016/j.jlumin.2017.01.032 ↗
20. A robust red-emitting phosphor-in-glass (PiG) for use in white lighting sources pumped by blue laser diodes10.1016/j.jallcom.2017.01.256 ↗
21. Mn2+ and Mn4+ red phosphors: synthesis, luminescence and applications in WLEDs. A review10.1039/C8TC00251G ↗
22. Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes10.1038/ncomms5312 ↗
23. Warm-white light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering10.1364/OL.35.003372 ↗
24. White LED based on YAG : Ce,Gd phosphor and CdSe–ZnS core/shell quantum dots10.1109/LPT.2010.2046724 ↗
25. Stacked quantum dot embedded silica film on a phosphor plate for superior performance of white light-emitting diodes10.1021/am500429c ↗
26. Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with a red phosphor layer10.1016/j.jallcom.2015.07.118 ↗
27. A new-generation color converter for high-power white LED: transparent Ce3+:YAG phosphor-in-glass10.1002/lpor.201300140 ↗
28. Glass ceramic phosphors: towards long‐lifetime high‐power white light‐emitting‐diode applications–A review10.1002/lpor.201700344 ↗
29. High-power laser-driven phosphor-in-glass for excellently high conversion efficiency white light generation for special illumination or display backlighting10.1039/C8TC01178H ↗