Full-visible-spectrum lighting realized by a novel Eu2+-doped nitride-based cyan-emitting phosphor.
Dalton Trans
; 50(30): 10446-10454, 2021 Aug 04.
Article
em En
| MEDLINE
| ID: mdl-34254623
ABSTRACT
Cyan phosphors have attracted considerable attention in recent years as an indispensable component for realizing full-spectrum lighting. In this study, a novel nitride-based cyan-emitting phosphor Ca2BN2ClEu2+ was successfully prepared. Its crystal structure refined by the Rietveld refinement reveals that Ca2BN2Cl is formed by a tight host lattice and the edge-sharing Ca(N,Cl)4 tetrahedrons along with multiple crystallographic Ca sites for Eu2+ ions to occupy, which corresponds to its broad emission band. Under the near ultraviolet (NUV) light excitation, Ca2BN2ClEu2+ emits a broad-band cyan light and its full width at half-maximum (FWHM) can reach 121 nm, which effectively compensates the "cyan cavity". The time-resolved photoluminescence (TRPL) spectra of Ca2BN2ClEu2+ were investigated to expose the energy transfer between the multiple luminescent centers. Furthermore, the temperature-dependent spectra of Ca2BN2ClEu2+ were measured to evaluate its thermal stability. All of the discussion and results reveal that Ca2BN2ClEu2+ is a promising cyan phosphor for use in white light-emitting diodes to realize full-spectrum lighting.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Dalton Trans
Assunto da revista:
QUIMICA
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China