(INVITED)Narrow-band violet and blue emission of Bi3+ in M10P6O25 (M = Ca, Sr) based on highly symmetric crystal structure

• DOI: 10.1016/j.omx.2022.100136
• Publication Date: 2022-01-22T07:28:38Z
• Authors: Peipei Dang; Wei Yang; Qianqian Zhang; Dongjie Liu; Hongzhou Lian; Guogang Li; Jun Lin
• Keywords: Chromaticity; Color temperature; Color rendering index; Gamut

Phosphor materials with narrow emission bands are highly interesting for light-emitting diode (LED) lighting and display applications. However, designing novel Bi3+-doped phosphors desirable band emission, high luminous efficiency good thermal stability is a challenging task. Here, two violet- blue-emitting narrow-band M10P6O25:Bi3+ (M = Ca, Sr) designed based on the small Stokes shift introduction of Bi3+ into symmetric lattice sites. Both exhibit broad absorption in 300–380 nm, matching well n-UV LED chip. Under UV light excitation, Ca10P6O25:Bi3+ shows violet peaking at 392 nm full width half-maximum (FWHM) 36 color purity 98%. Sr10P6O25:Bi3+ emits blue (400–550 nm) FWHM 66 88%. More importantly, as-prepared show (>82%@150 °C) relatively photoluminescence quantum yields (PLQY >50%). Moreover, fabricated can be used anti-counterfeiting. The as-fabricated white utilizing possesses CIE chromaticity coordinates (0.345, 0.363), rendering index (CRI) 87.5 correlated temperature (CCT) 4992 K. above investigations indicate that promising phosphor candidates wide-color-gamut potential anti-counterfeiting