Red-emitting Ca2Si5N8Eu2+ phosphor: a new recommendation for improving color uniformity and color quality scale of the conformal packaging multi-chip white LEDs

Abstract

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, 7000K, 5600 K multi-chip white LED lamps (MCW-LEDs). The influence of the Red-Emitting Ca2Si5N8Eu2+ Phosphor concentration on the color uniformity and the CQS is simulated, analyzed with using Mat lab and Light Tools 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 essential recommendation for selecting and developing the phosphor materials for MCW-LEDs manufacturing.