Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 7, 2024

Abstract The exploitation of borate‐based phosphors is garnered tremendous attention in w LEDs. Although previous research provided some insights into borates from the viewpoints synthesis, structure, and defect evolutions, their photoluminescence (PL) with dopants still insufficient for actual application, especially on aspects efficiency/stability. Herein, to alleviate above issues, a new type lesser‐known high symmetry Ba 3 Y 2 B 6 O 15 (BYB) codoped Dy 3+ /Eu are synthesized via multistep solid‐state reaction possessed controllable PL based n UV excitation, defect‐induced (self‐) PL, energy transfer (ET) Eu . origin blue self‐PL clarified oxygen‐related defects optimized adjusting synthetic atmosphere (air/Ar) (co)doping control content. Thanks dense connectivity, highly symmetric structure perfectly ordered octahedral sites accommodation Dy/Eu ET, “cool” white red , respectively, show efficiency narrow full width at half maximum (fwhm). phosphor also exhibits excellent thermal stability because bandgap low electron‐phonon coupling. Finally, high‐quality phosphor‐converted LED (pc‐ LED) device assembled remote “capping” packaging by adopting BYB: 350 nm chip.

Language: Английский