Investigation of strontium silicate yellow phosphors for white light emitting diodes from a combinatorial chemistry

Abstract

In order to develop yellow phosphors that emit efficiently under the 450–470 nm excitation range, combinatorial chemistry was used based on silicate materials and investigated in an attempt to develop white light-emitting diodes (LEDs) by combining it with an InGaN blue LED chip (460 nm). Quaternary and ternary combinatorial libraries were developed to synthesize, process, and screen for silicate materials. Our combinatorial chemistry system consists of solution-based combinatorial synthesis and characterization, enabling the swift scanning of luminance. As a consequence of the combinatorial approach, several candidates were found to show high luminance under the 450–470 nm excitation range.