Using Red-emitting Ca2Si5N8Eu2+ phosphor for improving color uniformity and color quality scale of the in-cup packaging MCW-LEDs


Tran Thanh Nam, Tran Hoang Quang Minh, Le Anh Vu

Source title

International Journal of Automation and Smart Technology

Publication year

Light emitting diodes (LEDs) are commonly used in general lighting applications due to their rapidly improving efficiency, long-life, compact, low power consumption, and high climate resistance. In this paper, the Red-Emitting Ca2Si5N8Eu2+ Phosphor was investigated like an innovative approach for improvement on the color uniformity and Color Quality Scale (CQS) of 8500 K, 7700K, 7000 K multi-chip white LED lamps (MCW-LEDs) with the in-cup packaging. The influence of the Red-Emitting Ca2Si5N8Eu2+ Phosphor concentration on the color uniformity and the CQS is simulated, analyzed, and investigated with using Mat lab and LightTools software. The research results indicated that the color uniformity and the CQS were crucially affected by the Red-Emitting Ca2Si5N8Eu2+ Phosphor concentration. This paper provided an important recommendation for selecting and developing the phosphor materials for the in-cup packaging MCW-LEDs manufacturing in the near future.