Photoluminescence properties and local electronic structures of rare earth-activated Sr3AlO4F

Efficient Near‐Infrared Emission of Ce3+–Nd3+ CoDoped (Sr0.6Ca0.4)3(Al0.6Si0.4)O4.4F0.6 Phosphors for c‐Si Solar Cell

“…Although this energy will soon nonradiative relax to the lower component of 5d level, the energy is still unstable and ready to re-jump to 4f levels. 33 Meanwhile, a radiative energy transfer occurs from the lowest level Ce 3+ : 2 D 3/2 to Nd 3+ : 2 G 7/2 , with a nonradiative energy transfer occurs between Ce 3+ : 2 D 5/2 and Nd 3+ : 2 G 11/2 . Inside the Nd 3+ ions, this part of energy is easy to relax to the 4 F 3/2 level soon through the nonradiative transition.…”

“…When Ce 3+ is irradiated by 440 nm blue light, electron is pumped to the higher component of 5 d level. Although this energy will soon nonradiative relax to the lower component of 5 d level, the energy is still unstable and ready to re‐jump to 4 f levels . Meanwhile, a radiative energy transfer occurs from the lowest level Ce 3+ : 2 D 3/2 to Nd 3+ : 2 G 7/2 , with a nonradiative energy transfer occurs between Ce 3+ : 2 D 5/2 and Nd 3+ : 2 G 11/2 .…”

Tunable luminescence in Bi3+ and Eu3+ co-doped Sr3AlO4F Oxyfluorides phosphors

“…Since the synthesis and structural characterization of the new A(1) 3 À m A(2) m MO 4 F family (A(1)/A(2)¼Ca, Sr, or Ba and M¼Al or Ga), new hosts doped with rare-earth ions (Eu 3 þ , Tb 3 þ , Sm 3 þ , or Ce 3 þ ) as visible light inorganic phosphors have been widely explored [1][2][3][4][5][6][7]. In addition, the defects in anion-deficient nonstoichiometric (Sr 3 À m A m ) 1 À α À 2δ MO 4 À α F 1 À δ , which shows selfactivating photoluminescence (PL) emission, were recently observed [8][9][10][11].…”

“…The excitation (Solid and dash lines mean excitation spectra emitted at 619 and 427 nm, respectively) and emission (Solid and dash lines mean emission spectra excited at 304 and 320 nm, respectively) spectra of (a) Sr 2.9925-3m/2 Bi m Eu 0.005 AlO4 F, m¼ 0 (A), 0.001(B), 0.005(C), 0.01(D), 0.05(E), and (b) Sr 2.85-3m/2 Bi m Eu 0.1 AlO 4 F, m¼ 0 (A), 0.001(B), 0.005(C), 0.01(D), 0.05(E).…”

Inhomogenous Broadening, Charge Compensation, and Luminescence Quenching in Ce3+-Doped Sr3AlO4F Phosphors

“…Recently, a new family of Ce 3+ -doped luminescent materials based upon hosts with the Cs 3 CoCl 5 structure has been reported in the literature [2][3][4][5][6] that have potential use for LED-based lighting. The Cs 3 CoCl 5 structure has a degree of flexibility in that there are a variety of cations that can occupy the 10-coordinated 4a site, the 8-coordinated 8h site, and the 4-coordinated 4b sites as well as F − /O 2− occupation of the 4c anion site.…”