Mn⁴⁺ non-equivalent doped fluoride phosphors with a short fluorescence decay time for backlighting

Abstract

The non-equivalent doping of Mn4+ in the red-emitting fluoride phosphors effectively shortens the fluorescence lifetime. Herein, we successfully synthesized Rb2NaInF6:Mn4+ phosphors by an ion-exchange method. The compensation mechanism of Mn4+...

Optical enhancement of highly efficient organic–inorganic oxyfluoride red phosphors via the cation co-doping strategy

“…Fig. 1f shows the fluorescence lifetime decay curves ( λ ex = 470 nm, λ em = 632 nm) of [N(CH 3 ) 4 ] 3 MoO 3 F 3 : x Mn 4+ ( x = 2%, 4%, 6%, 8% and 10%) phosphors, which can be fitted with a single exponential function (eqn (5)): 27,43 I ( t ) = I 0 exp (− t / τ ) + A where I 0 and I ( t ) denote the initial fluorescence intensity and emission intensity at moment t of the as-prepared samples, τ is the fluorescence decay time, and A represents a constant. When the concentration of Mn 4+ increased from 2% to 10%, the fluorescence lifetimes of the samples were 3.90 ms, 3.76 ms, 3.49 ms, 2.89 ms and 2.88 ms, respectively.…”

“…Fig. 1f shows the fluorescence lifetime decay curves (λ ex = 470 nm, λ em = 632 nm) of [N(CH 3 ) 4 ] 3 MoO 3 F 3 :xMn 4+ (x = 2%, 4%, 6%, 8% and 10%) phosphors, which can be fitted with a single exponential function (eqn (5)): 27,43…”

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

“…7(d) shows ln( I 0 / I T − 1) versus 1/ KT (eV −1 ), with the thermal activation energy (Δ E ) calculated from the Arrhenius formula as 0.35 eV. The activation energy Δ E (eV) can be calculated using the following equation: 43,44 where I T and I 0 are the emission intensity at the test temperature and room temperature, respectively, k is the Boltzmann constant (8.62 × 10 −5 eV K −1 ), and C is the constant of the host.…”

Exploring the physical properties of quaternary fluoro-elpasolites A2 NaInF6 (A = Cs,Rb)compounds for prospective technological applications

“…The under study double perovskites possess cubic structures and belong to the space group Fm3 ̅ m (225). The experimental lattice constants for Cs NaInF 2 6 is 8.905 Å [33] and for Rb NaInF 2 6 is 8.86 Å [34]. Table 1 provides the atomic structure parameters that have been utilized to create the 'unit cell' for the 'materials' of interest, while figure 1 displays the crystal structures that have been constructed.…”