LED phosphor is a necessary material for making white leds.
First, we need to understand how white leds emit light. White LED chips do not exist. The white leds we see are usually blue chips that excite yellow phosphors to emit white light. For example: blue paint and yellow paint mix to make white.
Secondly, LED blue chip with different wavelengths needs to cooperate with different wavelengths of yellow phosphors to maximize the white light.
Therefore, LED phosphor is necessary to make white LED (white LED also has several other ways of emitting light, but the white LED95% on the market is the principle of blue light chip to stimulate yellow phosphor).
