%0 Journal Article
%T Stacked phosphor coating technology for white LEDs with high colour temperature and high colour rendering index
%A H Wang
%A J Zhang
%A P Ge
%A Z Zhou
%J Lighting Research & Technology
%@ 1477-0938
%D 2019
%R 10.1177/1477153517727579
%X Existing white LEDs use a blue LED chip to stimulate phosphor powder to form white light. The surface coated with a phosphor layer directly affects the colour rendering index, the luminous efficacy and the colour temperature. We have encapsulated a white LED source with chip-on-board packaging to meet the requirements for a high power, high colour temperature, high colour rendering index LED using stacked phosphor coating. This chip-on-board white LED light source can achieve a colour rendering index over 95 and a luminous efficacy over 100£¿lm/W while the colour temperature is 5700£¿K. This technology can be widely used in commercial lighting applications where high quality light sources are needed
%U https://journals.sagepub.com/doi/full/10.1177/1477153517727579