Luminescent properties and energy transfer of CaO:Ce 3+ , Mn 2+ phosphors for white LED

Synthesis and photoluminescence properties of a novel red phosphor SrLaGaO4:Mn4+

“…One of the critical steps of indoor plant cultivation is to find reliable light sources which can provide tunable light spectrum to fit different plant photoreceptors. Light emitting diodes (LEDs) with overwhelming advantages of energy saving, compactness, long lifetime, and environmental friendliness as well as controllable light colors have defeated conventional incandescent, metal‐halide, and fluorescent lamps as the major artificial light sources for plant cultivation . Compared with blue and red LEDs, the fabrication of far‐red‐emitting LEDs is relatively more difficult.…”

Synthesis and luminescence properties of red‐emitting AlN:Mn2+ spherical phosphors

“…41 Due to the nephelauxetic effect and the increased crystal field strength caused by the high formal charge of N 3− , the Mn 2+ in the AlN host lattice provided a red emission, as with other Mn 2+ doped nitride phosphors. 42,43 Furthermore, Dexter's theory was used to further analyze the mechanism of energy transfer, 44 the relationship between luminescence intensity I and activator concentration X is as follows 45,46 :…”

Enhanced luminescence performance of CaO:Ce3+,Li+,F− phosphor and its phosphor-in-glass based high-power warm LED properties

“…In the insets of Figure 1B, Fdoped samples have deeper body color than the undoped ones at the same doping concentration (x = 0.003-0.013) of Ce 3+ , further confirming the above viewpoint. In order to figure out the energy transfer mechanism accounting for concentration quenching, the critical distance (Rc) can be calculated for estimation by the following formula 18,33 = 2 ( 2. Therefore, the slopes of the fitting lines are -1.13 and -1.05 in Figure 1C and S2, indicating that the concentration quenching behavior occurring in Fdoped and undoped samples are owing to the energy migration among nearest neighbor or next nearest neighbor activators.…”

“…[10][11][12] Moreover, CaO can be doped with various rare earth ions to obtain a series of phosphor-materials with special properties harvesting of photoluminescence, electron degradation, thermoluminescence, long persistence, energy transfer. [13][14][15][16][17][18] Among CaOphosphors, Ce 3+ -doped CaO (CaO:Ce 3+ ) with simple chemical composition, suitable excitation and emission spectra, is a promising yellow-emitting phosphor for blue light excited wLEDs. In addition, the emission spectrum of CaO:Ce 3+ owns more red spectral component than the commercialized YAG:Ce 3+ , making it more appropriate for warm-wLEDs.…”