Experimental and theoretical studies of red emission enhancing mechanism in Al-doped CaMoO4:Eu phosphor

Low-temperature in situ preparation of Eu3+/Tb3+-doped CaMoO4/SrMoO4 nanoparticle thin films and their application in anti-counterfeiting

“…Thus, the ratios of PL intensities between the 5 D 0 → 7 F 2 electric dipole transition and the 5 D 0 → 7 F 1 magnetic dipole transition for the Ca 1− x MoO 4 :Eu x 3+ thin films are around 11, which can be employed to determine the asymmetry of the Eu 3+ ions within the host lattice according to the literature reports. 50–53 This indicates that Eu 3+ ions occupy asymmetric sites, further confirming that Ca 2+ ions on the surface and inside of CaMoO 4 nanocrystals can be exchanged with Eu 3+ ions. Furthermore, the effect of Eu doping concentration on the PLQYs of Ca 1− x MoO 4 :Eu x 3+ thin films was investigated and the result was shown in Fig.…”

Room-temperature and ultrafast Eu3+ ion doping for highly luminescent and extremely small CaMoO4 nanocrystals

“…In addition, the PL intensity ratio ( R ) of 5 D 0 – 7 F 2 electric dipole transition/ 5 D 0 – 7 F 1 magnetic dipole transition is often used to determine the asymmetry of Eu 3+ ions in the host lattice. 41–44 For our extremely small Eu 3+ -doped CaMoO 4 nanocrystals, their R values are in the range of 9–11, revealing that Eu 3+ ions occupy the asymmetry sites. 45–47 Therefore, the Ca 2+ ions on the surface and inside the CaMoO 4 nanocrystals could be exchanged by Eu 3+ ions.…”

Judd–Ofelt Intensity Parameters and Optical Properties of Eu/Li Co‐Doped CeO2 Phosphor

“…[2,14,24] Furthermore, previous works indicated that combining empirical and theoretical methods can provide an overall picture of the behavioral emission of Eu 3 + -activated phosphor, which achieves a deep understanding of their emission mechanism and helps to design a new red phosphor system. [25,26] In this case of, the physical mechanisms underlying the peculiarities of emission spectra to predict the luminescence properties of different hosts/activator phosphor systems can be well understood by applying the JÀ O theory (JÀ O). [27,28] In JÀ O theory, absorption, excitation, and emission spectra are used to calculate three intensity parameters (Ω λ , λ = 2, 4, 6).…”

“…Recently, our works showed that the emission behavior of Eu 3 + can be explained well by combining experimental and theoretical (JÀ O theory) data. [15,25,32] However, to our knowledge, the intense orange-red emission and JÀ O theory applied to CeO 2 :Eu, Li phosphors have yet to be documented.…”