By efficiently converting the blue light emitted from InGaN chips into yellow light and mixing them into white light, classic yellow Y3Al5O12: Ce (YAG) phosphor has proved itself to be the most prominent phosphor in white light emitting diodes (w-LEDs). However, the color rendering index (CRI) of YAG: Ce-based w-LEDs is usually limited to < 70 and its correlated color temperature (CCT) is often higher than 4000 K for the lack of red component in the emission spectrum. In modern indoor lighting, a higher CRI and a lower (or warmer) CCT are required.
Click here for original story, Scientists fabricate novel ternary ceramic phosphor for warm white-LEDs
Source: Phys.org