Development of Dy3+ activated K2MgP2O7 pyrophosphate phosphor for energy saving lamp

Investigation of defect related photoluminescence property of multicolour emitting Gd2O3:Dy3+phosphor

“…[43][44][45] Similarly the dominant blue emission is observed for the Dy 3+ ions occupying the inversion site in GdPO 4 , K 2 MgP 2 O 7 and GdFeO 3 phosphor. [46][47][48] In case of Gd 2 O 3 , a sesquioxides with cubic bixbyite structure (Ia 3) have crystallographically two nonequivalent cationic sites with 6-fold coordination namely C 2 non-inversion symmetry with Gd 3+ in the centre of a distorted cube with two oxygen vacancies on the face diagonal and S 6 site symmetry with inversion symmetry resulting from two oxygen vacancies lying on one body diagonal. 49 The photoluminescence properties varies with the site preference.…”

Optical property investigations of polystyrene capped Ca2P2O7:Dy3+ persistent phosphor

“…(Fig. 6) manifests sharp f-f fluorescent transition of Dy 3+ around the range of 300-400 nm.The different excitation peaks observed at 325 nm, 352 nm, 365 nm and 387 nm are attributed to transitions from ground state 6 H 15/2 to the higher excited states 6 P 3/2 , 6 P 7/2 , 6 P 5/2 , 4 K 17/2 , respectively [29]. However, maximum PL intensity is found for 352 nm excitation wavelength.…”

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

“…In particular, their applications as LED devices can help in replacing argon-mercury discharge fluorescent lamps, which are extensively used for general lighting purposes. They can also be applied as alternative mercury-free excitation sources for avoiding the use of hazardous ingredients and environmentally unsafe materials [20]. Moreover, they have been recently demonstrated as solar cell materials and high upconversion luminescent materials [21,22].…”