Efficient energy transfer and fluorescence in SrYAl 3 O 7 :Ce 3+ , Tb 3+ phosphor

Optical, crystallographic and Judd–Ofelt analysis of europium doped Sr6Y2Al4O15 nanocrystals for NUV-WLED fabrication

“…Morphological probes such as particle size, shape, and nature of the prepared nanophosphor were performed via SEMand TEM analysis, which revealed an irregular shape with porous nature. These pores and voids present in phosphor confirmed the solution combustion synthetic route due to escaping of numerous gases [22,23]. Figure 2a and b reports the SEM micrograph of as-synthesized (500 °C) and sintered (1100 °C) nanophosphor whilst the Fig.…”

Luminescence performance and energy transfer mechanism investigation of RE3+ (Eu3+/Tb3+/Ce3+)-doped Y2O3 phosphors

“…Doping an appropriate amount of Ce 3+ can improve the luminescence intensity of Tb 3+ , which can be explained by the fact that in the Y 2 O 3 matrix, Ce 3+ can transfer part of the absorbed energy to the higher-level transition of Tb 3+ ( 5 D 3 ), a conclusion previously reported by Loitongbam RS et al 35 Therefore, like most substrates, Ce 3+ can effectively transfer energy to Tb 3+ . 36,37…”

“…Doping an appropriate amount of Ce 3+ can improve the luminescence intensity of Tb 3+ , which can be explained by the fact that in the Y 2 O 3 matrix, Ce 3+ can transfer part of the absorbed energy to the higher-level transition of Tb 3+ ( 5 D 3 ), a conclusion previously reported by Loitongbam RS et al 35 Therefore, like most substrates, Ce 3+ can effectively transfer energy to Tb 3+ . 36,37 Fig. 7b shows the emission spectra of Y 1.9−z O 3 :Eu 3+ 0.1 ,Ce 3+ z (z = 0, 0.001, 0.002, 0.003, 0.004) at an excitation wavelength of 254 nm, and the intensity of the emission peak (Eu 3+ , 612 nm) keeps decreasing unlike Y 2 O 3 :Tb 3+ ,Ce 3+ .…”

Solution Combustion Synthesis and Energy Transfer in LaMgAl11O19:Tb3+/Sm3+ Tunable Phosphor

“…3(a) depicts the PL excitation (PLE) spectrum of LMA: Tb 3+ (2 mol%) phosphor by monitoring emission wavelength of 545 nm. The spectrum consists of a broad band ranging from 240 to 280 nm with the maximum at 260 nm, corresponding to 4f 8 →4f 7 5d 1 transition of Tb 3+ and a series of spectral bands in the range of 300-400 nm, analogous to the transitions between 4f→4f states of Tb 3+ [14,22]. The f→f transitions of Tb 3+ have been properly designated as 7 F6→ 5 H7 at 317 nm, 7 F6→ 5 D2 at 350 nm and 358 nm, and 7 F6→ 5 G6 at 375 nm [23].…”

“…al., reported the recent development in phosphors with different emitting colors via ET [13]. Recently, our previous work [14,15] reported an efficient ET from Ce 3+ to Tb 3+ in SrYAl3O7 and Tb 3+ to Eu 3+ in CaLaAlO4 phosphors.…”