The enhancement of the dual-layer phosphorus configuration in color uniformity and luminous flux of a light emitting diode

Abstract

<span><span>A solid-state process was used to generate the green phosphor Ca<sub>3</sub>Si<sub>2</sub>O<sub>4</sub>N<sub>2</sub>:Eu<sup>2+</sup>. The luminescence characteristics, dispersed reflection spectra, and heat quenching were investigated initially, followed by the </span></span>white light emitting diodes (wLED’s) manufacture by the Eu2+ stimulated Ca<sub>3</sub>Si<sub>2</sub>O<sub>4</sub>N<sub>2</sub> phosphor. Based on the concentration of ion Eu<sup>2+</sup>, a wide green emission range localized between 510 and 550 nm was seen in Eu<sup>2+</sup> -doped Ca3Si2O4N2. In Ca<sub>3</sub>Si<sub>2</sub>O<sub>4</sub>N<sub>2</sub>, the best doping concentration of Eu<sup>2+</sup> was 1 mol%. An electric multipolar interaction process conveys energy among Eu<sup>2+</sup> ions, with a necessary conversion distance of around 30.08 Å. Blending a near-ultraviolet (n-UV) light emitting diodes (LED) which has a GaN basis (380 nm) with the blue BaMgAl<sub>10</sub>O<sub>17</sub>:Eu<sup>2+</sup>, the green Ca<sub>3</sub>Si<sub>2</sub>O<sub>4</sub>N<sub>2</sub>:Eu<sup>2+</sup>, and the red Ca<sub>3</sub>Si<sub>2</sub>O<sub>4</sub>N<sub>2</sub>:Eu<sup>2+ </sup>phosphors yielded a wLED with a 88.25 color-rendering indice Ra at 6029 K correlating color temperature. Ca<sub>3</sub>Si<sub>2</sub>O<sub>4</sub>N<sub>2</sub>:Eu<sup>2+ </sup>appears to be a promising option to apply as a converting phosphor in wLED applications.