Novel narrow-band blue light-emitting phosphor of Eu²⁺-activated silicate used for WLEDs

Abstract

A novel narrow-band blue light emission has been realized in Eu2+-activated Rb2HfSi3O9.

A blue-emitting Eu2+-activated BaZnAl10O17phosphor for white light emitting diodes: structure and luminescence properties

“…At high concentrations, the decrease of emission intensity is caused by non-radiative transitions. 29,30…”

“…At high concentrations, the decrease of emission intensity is caused by non-radiative transitions. 29,30 Inokuti and Hirayama 31 developed a theory to explain the energy transfer between the energy levels of lanthanide compounds. They used a formula to describe the effect of energy transfer on the decay of luminescence.…”

Highly Efficient and Thermally Stable Ba0.75Al11O17.25: Eu2+, Mn2+ Phosphor with Dual Narrowband Blue and Green Emissions: A Promising Candidate for Wide Gamut Displays

“…The emission is originated from the emitting of Eu 2+ ions and peaked at 450 nm with a relatively narrow FWHM of 51 nm. [ 25–29 ] Next, by fixing the Eu 2+ concentration of 8%, Mn 2+ ions were further codoped into the host. As we can see, besides the 450 nm emission band, the PL spectrum of the BAO: 8%Eu 2+ , y %Mn 2+ ( y = 4, 6, 8, 10, 12) samples each shows an additional green emission band peaked at 515 nm with an extremely narrow bandwidth of 27 nm, which is due to the 4 T 1 → 6 A 1 transition of Mn 2+ ions ( Figure a) and consistent with the spectra observed in Mn 2+ single doped BAO phosphors.…”

Eu2+-activated MgAl2Si4O6N4: a novel oxonitridoalumosilicate blue phosphor for white LEDs

“…11,12 Eu 2+activated blue-emitting phosphors with good luminescence properties are strongly desired for obtaining safe and highquality white LEDs. 13,14 Oxynitride-based phosphors are considered promising phosphors as their excellent covalent properties and high charge form of nitrogen atoms. [15][16][17] The stabilized SiX 4 (X = O, N) tetrahedral structure in oxynitride can reduce Stokes shift, 18 which improves the thermal stability and optical efficiency of phosphors.…”

“…11,12 Eu 2+ -activated blue-emitting phosphors with good luminescence properties are strongly desired for obtaining safe and high-quality white LEDs. 13,14…”