Luminescent properties of Pr3+-doped SrZrO3 phosphors

Site-Dependent Luminescence from Pr3+ in Double-Perovskite-Type Alkaline Earth Lanthanum Tantalates

“…The PLE spectrum of CLTO:Pr 3+ for the PL peak at 657 nm showed an intense peak at 250 nm, which is assignable to the allowed 4f–5d transition for Pr 3+ at A sites. The assignment is supported because the 4f −5d excitation peak for Pr 3+ at A sites are frequently seen in the range from 220 to 250 nm in some Pr 3+ -doped perovskite-type oxides. − The PL spectrum of CLTO:Pr 3+ under the 4f–5d excitation at 250 nm exhibited two series of transitions from 3 P J (J = 2, 1, 0) and 1 D 2 levels. Because of the intense blue-green PL at 500 nm and red PL at 660 nm, the PL was discerned in white.…”

“…In perovskite-type oxides (ABO 3 ), including the materials above, Pr 3+ is usually doped at A sites because of the large ionic size . Therefore, the PL from Pr 3+ at A sites has been examined usually, and the PL properties have been reported in several materials. − Conversely, there are few reports on the PL properties from Pr 3+ at B sites so far. We previously examined PL from Eu 3+ and Tb 3+ at not only A sites but also B sites utilizing double-perovskite-type oxides, (AA’)­[BB’]­O 6 , and observed the site-dependent luminescence. , If Pr 3+ ions are doped into double-perovskite-type Ca 2 LaTaO 6 ((CaLa)­[CaTa]­O 6 , CLTO) and Ba 2 LaTaO 6 ((BaBa)­[LaTa]­O 6 , BLTO) replacing La ions, site-dependent luminescence from Pr 3+ is expected because the local structures of Pr 3+ are largely different between A and B sites.…”

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO4:Pr3+ phosphors

“…Generally, the PL properties of the Pr 3+ ions exhibit various luminescence levels such as 3 P 0 , 3 P 1 , and 3 P 2 , and an intense 3 P 0 À3F 2 emission at $651 nm. Many Pr 3+ ion-doped phosphors have been examined so far by D. Nakauchi et al [9], P. Wu et al [10], N. Wantana et al [7], T.J. Pérez-Juache et al [11], H. Zhou et al [12], and K. Wu et al [13] to name but a few. Furthermore, M + ions (alkali metal ions) serve a significant role in improving the efficacy through charge compensation.…”

Europium‐Activated Perovskite Cubical SrZrO3 Red Phosphor: Synthesis, Characterization, and Sustainable Applications in PC‐LEDs and Environmental Forensic Analysis

“…Many earlier literature reports analyzed the luminescence properties of the rare earth ions, Sm 3 + , Tm 3 + , Pr 3 + , Eu 3 + , and Tb 3 + , activated MZrO 3 (M = Ca, Sr, and Ba) perovskite-type oxide phosphors. [25][26][27][28][29][30][31][32][33][34] AZrO 3 (A = Sr, Ba) is one such perovskite compound that behaves as an efficient phosphor matrix due to its high proton conductivity at elevated temperatures, photothermal stability, high dielectric constant (about 27-34), high melting point and wide band gap (5-7 eV). The easily induced vacancies at the axial and planar oxygen sites of the [ZrO 6 ] octahedral are due to the displacement of the Sr 2 + and the Zr 4 + ions and the extrinsic/intrinsic defects that arise due to the replacement of the Sr 2 + and the Zr 4 + ions by the dopant cations in the SrZrO 3 play an important role in the luminescence mechanism.…”