Co-precipitation synthesis and photoluminescence properties of Ba1−xMoO4:xEu3+ red phosphors

Luminescence properties of novel red-emitting phosphor InNb1-xPxO4:Eu3+ for white light emitting-diodes

“…The conventional solution is adding a red-emitting phosphor to the unit of the white LEDs. In this approach, most red phosphors, for example Y 2 O 2 S:Eu 3+ , CaS:Eu 2+ and SrS:Eu 2+ , are based on sulfides which are chemically unstable and inefficient [5,6]. Therefore, exploring novel red phosphors to overcome the above disadvantages is very necessary.…”

Photoluminescent properties of Eu3+-doped alkaline earth metal molybdates red phosphors with high quenching concentration

“…Fig. 7(a), a strong broad band from 220 nm to 340 nm is assigned to the combination of the charge transfer band (CTB) transition of O 2 À -Mo 6 þ and O 2 À -Eu 3 þ groups [17,23,27]. For CaMoO 4 :yEu 3 þ , when the Eu 3 þ concentration is increased to 0.08 or 0.20, the absorption intensity of the samples becomes weaker because the concentration quenching occurs.…”

“…Mo ions are the central metal ion and coordinated by four O 2À ions, leading to that the structure is very stable [20][21][22]. Feng et al [23] and Xu Li et al [24] had analyzed the luminescent properties of Ba 1À x MoO 4 :xEu 3 þ and SrMoO 4 :Dy 3 þ phosphors, respectively. Fa-bin Cao et [25] and Ca 0.54 Sr 0.34-1.5x Eu 0.08 Sm x (MoO 4 ) y (WO4) 1À y [26] had the high-efficiency red light emission under 395 nm excitation.…”

Synthesis and Photoluminescence Properties of HEu<SUB>1-<I>x</I></SUB>Gd<SUB><I>x</I></SUB>(MoO<SUB>4</SUB>)<SUB>2</SUB> Nanophosphor

“…Some strong narrow peaks are observed between 360 and 500 nm and are attributed to the 4f-4f transitions of the Eu 3+ ion. On the other hand, the CT band of Eu 3+ -O 2− is not clearly observed in the excitation spectra, possibly due to the overlap of the CT band with that of the molybdate group [15], [17]- [19]. In the emission spectra, all peaks corresponded to the Eu 3+ 4f-4f transition.…”