Subjects: Materials Science >> Electronic, Optical and Magnetic Materials submitted time 2019-04-30
Abstract: CsKNaLi(Li3SiO4)4:Eu2+ (CKNLLSO:Eu2+) as a new member of oxide-based family with UCr4C4-related type structure was first synthesized successfully. The crystal and band structure of the host compound was characterized and analyzed by aid of Rieveld refinement and density functional theory, respectively. As a result of the highly condensed and rigid anion framework, Eu2+ substituting Cs site gives intense green emission with a narrow full width at half maximum of 55 nm excited by InGaN-based near UV LEDs. The CKNLLSO:Eu2+ phosphor exhibits relatively high thermal stability even though the temperature was raised to 190 ℃. The LED fabricated using the optimized CKNLLSO:4%Eu2+ phosphor demonstrated bight and narrow green light with chromaticity coordinate (0.2320, 0.6016) and correlated color temperature 7314 K, implying its great potential for applications as green components for white LEDs.
Peer Review Status:Awaiting Review