The novel design of a remote phosphor ceramic plate for white light generation in high power LEDs

Abstract

Here, we report a phosphor ceramic plate (PCP) constructed using Y₃Al₅O₁₂:Ce³⁺ (YAG:Ce) nanoparticles (NPs) with a uniformly spherical size distribution for high-power light emitting diode (LED) applications. YAG:Ce NPs with diameters of 600 nm were synthesized using the forced hydrolysis method, and the typical excitation and emission of the PCP constructed using YAG:Ce NPs were observed on blue light emitting InGaN chips, as a conversion process for the generation of white LEDs with high luminous flux and thermal stability. In addition, for the improvement of the PCP characteristics, a novel design using graphene-embedded red phosphor (GRP) layer was utilized. The GRP-coated PCP displayed a higher CRI value of 82 and warm white light with a correlated colour temperature (CCT) of 3952 K compared to the general PCP. This type of PCP is expected to be an outstanding candidate for the production of luminescent materials in various fields of optoelectronics.