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Julius Leano, Jr.
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article
Green light-excitable Ce-doped nitridomagnesoaluminate Sr[Mg2Al2N4] phosphor for white light-emitting diodes
Abstract
A Ce<sup>3+</sup>-doped nitrodoagnesoaluminate Sr[Mg<sub>2</sub>Al<sub>2</sub>N<sub>4</sub>] phosphor was prepared from all-nitride precur- sors using gas pressure sintering method. The effective excitation by green light (510 nm) that revealed a broad emission from 550-650 nm prompted an innovation in the assembly of the pc-LED by using a blue chip LED that is sequentially coated with a green-emitting phosphor (<i>β</i>-SiAlON:Eu<sup>2+</sup>) that excites the upper Sr[Mg<sub>2</sub>Al<sub>2</sub>N<sub>4</sub>]:Ce<sup>3+</sup> layer thereby producing white light. The use of this broadband emitting phosphor and the innovative configuration generates white light and puts forward two promising innovations for pc-LEDs.