Tunable luminescence from Eu3+ and Ce3+ doped/co-doped color tunable Na4Ca(PO3)6 phosphors for white LEDs and solar cell applications

Tunable luminescence from Bi3+ sensitized La2Zr2O7:Eu3+ red nanophosphors for display applications

“…The excited electrons subsequently relax to the 5 D 0 level of Eu 3+ via a non‐radiative transition, and then de‐excite to the 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 and 5 D 0 → 7 F 4 levels of Eu 3+ by emitting bright orange, red lines at 615 nm, 646 nm, and 665 nm, respectively. [ 67–69 ]…”

“…7 F 4 levels of Eu 3+ by emitting bright orange, red lines at 615 nm, 646 nm, and 665 nm, respectively. [67][68][69] Using the emission spectra data of La 2 Zr 2 O 7 :0.5 at% Bi 3+ ,y at% Eu 3+ (y = 1, 2, 3, 4 and 5) samples, the CIE chromatic color coordinates were evaluated by color calculator version 7.77 software and are depicted in Figure 10. The corresponding color correlated temperature (CCT) values are evaluated by using the formula given in equation 6.…”