Highly efficient and self-activating Zn3V2O8 phosphor for the fabrication of cool-white light emitting devices

Optical analysis of RE3+ (RE = Eu,Tb):MgLa2V2O9 nano‐phosphors

“…This implies that the immediate surroundings of the rare‐earth ions have a substantial impact on their luminous efficiency. Changes in the local crystal field are more likely to divide and shift the emission band in the ( 5 D 0 → 7 F 2 ) transition than in the other transitions [19, 24]. Since it is widely known that the powder phosphors luminous performance are particularly sensitive to the concentration of the activator ion, finding the optimal doping concentration is essential.…”

“…Fluorescent lamps that utilize these Eu 3+ :MgLa 2 V 2 O 9 powder phosphors show great promise due to their high red emission at 615 nm, which is induced by an excitation wavelength of 396 nm. The majority of the light that is seen is the consequence of transitions between 4f levels, and this luminescence is produced by interactions between magnetic or electric dipoles [24]. This transition is called a “hypersensitive transition” because it depends so heavily on the surroundings of Eu 3+ and its ligands.…”

Highly efficient rare-earth free vanadate phosphors for WLEDs

“…In recent years, due to the small reserves and large demand for rare Earth elements, more and more researchers have begun to explore non-rare Earth phosphors. 12 At present, the preparation methods of rare-Earth free luminescent materials are as follows: 13 (i) utilizing substances like tungstates and vanadates, [14][15][16][17] (ii) using transition metal ions as luminescence centers, [18][19][20][21][22][23] and (iii) utilizing defects like oxygen (O) vacancies to emit light. 24 Vanadates are a popular choice among the three methods because of their low price, environmental friendliness and high quantum efficiency.…”

Structural, photoluminescence, and photocatalytic performances of Ce3+‐activated orthovanadate oxides M3(VO4)2 (M: Mg or Zn) synthesized by solution combustion route

“…In orthovanadates, luminescence centres are formed by tetrahedral VO 4 clusters present in the crystal structure. Under ultraviolet (UV) light irradiation, the excitation mechanism involves charge transfer (CT) from an electron in the oxygen 2p orbital to the vacant 3d orbital of the V 5+ ion situated in the tetrahedral VO 4 unit [7][8][9]. Nakajima et al [1] conducted an investigation into the luminescence and colour properties of M 3 (VO 4 ) 2 (M = Mg, Ni, Zn) using the solid-state reaction method for synthesis.…”

“…In orthovanadates, luminescence centres are formed by tetrahedral VO 4 clusters present in the crystal structure. Under ultraviolet (UV) light irradiation, the excitation mechanism involves charge transfer (CT) from an electron in the oxygen 2 p orbital to the vacant 3 d orbital of the V 5+ ion situated in the tetrahedral VO 4 unit [7–9].…”