Photoluminescence properties of (Ba1−xEux)WO4 red synthesized by the coprecipitation/calcination method

A superior visible light-driven photocatalyst: Europium-doped bismuth tungstate hierarchical microspheres

“…The increased activity of catalyst was proposed to occur via the trapping of photogenerated electrons in the catalyst by Eu dopant, thereby reducing the extent of electron-hole recombination [31]. Considering the standard redox potentials of Eu 3+ /Eu 2+ and O 2 / O 2 À (E 0 (Eu 3+ /Eu 2+ ) = À0.36 V and E 0 (O 2 /O 2 À ) = 0.0338 V), it was found that the presence of Eu 3+ ions on composites surface might cause the following steps [32]:…”

Effect of partial preferential orientation and distortions in octahedral clusters on the photoluminescence properties of FeWO4 nanocrystals

“…7,8 The second tungstate oxides exhibit a wolframite-type monoclinic structure where both M and W atoms are bonded to six oxygen atoms, which results in the formation of octahedral [MO 6 ]/[WO 6 ] clusters. 9,10 These differences in the coordination/structure cause defects in the crystal lattice and the appearance of photocatalytic, 11,12 photoluminescence (PL), [13][14][15][16] humidity sensor [17][18][19] and magnetic properties 20,21 as well as electronic properties for the tungstates.…”

KSr4(BO3)3:Pr3+: A new red-emitting phosphor for blue-pumped white light-emitting diodes

“…However, this white light, due to the lack of red component, slants cold [8][9][10]. The other approach is mixed tri-color (red, green and blue) phosphors in which red phosphors have more significant effect on the luminous flux than green and blue [11]. Pr 3+ -doped materials show intense 3 P 0 → 3 H 6 emission in the red spectral region, which have been widely adopted as red emitting phosphors [12][13][14][15][16][17].…”