Highly efficient green-emitting phosphor Sr₄Al₁₄O₂₅:Ce,Tb with low thermal quenching and wide color gamut upon UV-light excitation for backlighting display applications

Abstract

This work shows a useful method to design new green phosphors with ultra-narrow emission bands effectively via managing the energy-transfer efficiency from Ce3+ to Tb3+ ions in perfectly matched inorganic compounds.

Efficient Ce3+ → Tb3+ energy transfer pairs with thermal stability and internal quantum efficiency close to unity

“…The faster decay can be ascribed to the enhancing probability of nonradiative transition for the excited Tb 3+ , which was related to the effects of the ET among the Tb 3+ ions and the traps generated by the nonequivalent substitution of Tb 3+ for Ca 2+ sites. 33,38 What is more, the ET efficiencies (η T ) for Ce 3+ → Tb 3+ pairs were estimated based on both the PL intensity and the lifetime by employing the following equations: 33,39…”

Improving the luminescence property of the novel yellow-emitting phosphor SrLa2Sc2O7:Bi3+ with charge compensators (Li+, Na+, K+) and its application in NUV-based white LEDs

“…The type of electrical multipole interaction can be determined by analyzing θ , where θ = 6, 8 and 10 indicate the type of multipole interaction as dipole–dipole (d–d), dipole–quadrupole (d–q) and quadrupole–quadrupole (q–q), respectively. 36,37 In Fig. 4(c), the calculated θ = 5.43 is close to 6 indicating that the quenching mechanism of the Bi 3+ ion is an electric d–d interaction.…”

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 energy transfer efficiency was calculated by the following Equation ( ) . [ 34–36 ] where η T represents the energy transfer efficiency, τ S0 and τ S represent the PL lifetimes of Eu 2+ without and with co‐doping of Mn 2+ , respectively. The calculated energy transfer efficiency was plotted as a function of Mn 2+ concentration (Figure S4b, Supporting Information).…”