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Green-emitting CaF2:Ce3+,Tb3+ phosphor: selection for improving luminous flux and color quality of conformal geometry white LED lamps

Tin P. T., Minh T. H. Q., Nhan N. H. K., Lee H.-Y., Trang T. T.

Materials Science Poland

2018

Vol. 36, No. 4

563--569

In the last decades, new solutions for improving lighting properties of white LED lamps (WLEDs) have been the main research direction in optoelectronics. In this paper, a modern approach for enhancing luminous flux and color quality of white LED lamps was presented. By mixing green-emitting CaF2:Ce3+,Tb3+ phosphor with yellow-emitting YAG:Ce phosphor compound, the luminous flux and color quality of white LED lamps with conformal phosphor geometry (CPG) increased significantly. From the obtained results it follows that, the luminous flux increased more than 1.5 times, and the correlated color temperature deviation decreased more than 4 times in comparison with the non-green-emitting CaF2:Ce3+,Tb3+ phosphor. The presented research shows that the green-emitting CaF2:Ce3+,Tb3+ phosphor could become a good candidate for enhancing luminous flux and color quality of white LED lamps.

Spectrally Tuneable LED Lighting Simulator Laboratory Room at University of Panonia

Szabo F., Csuti P., Schanda J.

Przegląd Elektrotechniczny

2013

R. 89, nr 6

348--351

In our research laboratory – first in Europe – two laboratory rooms have been developed, which are equipped with spectrally tuneable LED lighting system. This lighting system contains 17 kinds of narrow-band colour LEDs (having peaks between 410 nm and 690 nm) and 3 kinds of phosphor white LEDs. Visual experiments carried out so far in lighting booths can be adapted into the real-size experimental environment, which describes real situation. In case of full-scale experiments, observer is able to do psycho-physical experiments with full immersion.

Zaprojektowano i wykonano - pierwsze w Europie – laboratoryjne pomieszczenie ze spektralnie strojonym światłem LED. System składa się z 17 wąskopasmowych diod (międy 410 nm I 690 nm) oraz trzech fosforowych białych diod.

Stosowanie w praktyce miary jakości barwy sztucznych źródeł światła

Turlej Z.

Nowa Elektrotechnika

2005

nr 10 (14)

24--27