6533b857fe1ef96bd12b3cd2
RESEARCH PRODUCT
Tunable Eu2+ emission in KxNa1 − xLuS2 phosphors for white LED application
V. LagutaMartin RejmanJan BártaJan BártaMaksym BuryiLubomír HavlákMartin NiklV. Jarýsubject
Materials sciencePhotoluminescenceWhite LEDsAnalytical chemistryPhosphor02 engineering and technologyColor temperature01 natural scienceslaw.inventionlaw0103 physical scienceslcsh:TA401-492General Materials ScienceEmission spectrumElectron paramagnetic resonanceSpectroscopyPhotoluminescence010302 applied physicsMechanical Engineering021001 nanoscience & nanotechnologyCircadian light sourcesSolid-state lightingMechanics of MaterialsEu2+ emissionlcsh:Materials of engineering and construction. Mechanics of materialsEPR0210 nano-technologyLuminescencedescription
Set of Eu2+-doped KxNa1 − xLuS2 phosphors (x = 0–1) in the form of transparent crystalline hexagonal platelets was successfully synthesized by chemical reaction under the flow of hydrogen sulfide. Their physical properties were investigated by means of X-ray diffraction, X-ray fluorescence, time-resolved luminescence spectroscopy and electron paramagnetic resonance. Special attention was given to photoluminescence emission spectra under the 395 nm and 455 nm excitation aiming to obtain white emission with tunable color temperature. EPR method was employed to understand the Eu2+ incorporation and distribution in the KxNa1 − xLuS2 hosts. CIE xy-coordinates were calculated to compare effects of different K/Na concentration in KxNa1 − xLuS2 on resulting spectrum. The application potential of mentioned compounds in the field of white LED solid state lighting phosphors is thoroughly discussed. Keywords: White LEDs, Photoluminescence, Eu2+ emission, Circadian light sources, EPR
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-01 | Materials & Design |