A revisit of photoluminescence property for vanadate oxides AVO3 (A:K, Rb and Cs) and M3V2O8 (M:Mg and Zn)

Low-temperature synthesis of white-light-emitting CsVO₃ nanoparticles by an aqueous solution route

“…On the other hand, the PL peak position of the sample in the present study was 510 nm, and the peak value shifted to the low-wavelength region. CsVO 3 shows two PL peaks (Em1, Em2), 7) and we too observed these Em1 and Em2 peaks. We carried out deconvolution of the PL spectrum of the sample heat-treated at 200°C, and the result is shown in Fig.…”

“…Where, The Em1 and Em2 peaks were 2.43 and 2.05 eV, respectively. We evaluated the Em2/Em2 value of the previous study 7) in which the phosphor was synthesized by a solidstate reaction, and that value was 0.53. In the present study, Em1 of the phosphor was much larger than Em2, so the peak positions in the present study shifted to lower-wavelength region.…”

On structure and methylene blue degradation activity of an Aurivillius-type photocatalyst of Bi4V2O11 nanoparticles

“…Below the cutoff of the absorption edge the sample shows two distinct absorption bands, i.e., 200-400 nm and 400-600 nm. Two possible attributions could be assigned to the band-gap transition in Bi 4 V 2 O 11 , the one is the charge transfers (CT) transitions from O 2− to central V 5+ inside VO 4 3− groups [36], and another is the transition of the 6s electrons of Bi 3+ ions to the empty 3d orbitals of V 5+ . As shown inset Fig.…”

“…The optical absorption bands corresponding to the spin-allowed transitions can be taken place from the ground state 1A 1 to the excited states 1T 2 and 1T 1 levels, respectively [36]. Usually this absorption is only located in the UV wavelength region (250-400 nm) [37].…”

Vanadate Phosphors for Energy Efficient Lighting

“…The added PEG forms a polymeric network and prevents non-uniform aggregation. Park and Nam [19] synthesized high-quality (Y 0.5 Gd 0.5 ) 0.94-x Al x Eu 0.06 VO 4 (x=0 to 0.04) red phosphors by ultrasonic spray pyrolysis technique and Chang et al [20] [21][22][23][24][25]. It is well known that vanadate compounds enjoy a special place as they are capable of luminescing both with and without activators.…”