Blue-excited red emission of CeO2:Eu3+, Al3+ cubic phosphor: Influence of Al3+ ion doping and Judd-Ofelt theory

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

“…It can be seen that the difference between the t exp and t cal values were caused the ET cross-relaxation processes of Eu 3 + ion, leading to a decrease in the quantum efficiency values. Furthermore, the product of the lifetime and the emission cross-section is called optical gain, which can be expressed as follows: [59] P ¼ s � t exp (15) The high values of the optical gain (Table 6), branching ratios (b r ), and long lifetime of the phosphors make it suitable for laser materials.…”

“…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.…”

“…[6][7][8] Practically, rare-earth (RE) trivalent ions doped CeO 2 lattice is the simplest way to improve their physicochemical properties for industrial multifunction applications due to their close ionic radius to that of Ce 4 + ion. [9,10] Therefore, various appoaches to synthesizing REdoped CeO 2 nanoparticles include the hydrothermal method, [11] co-precipitation, [12] sol-gel, [13] solution combustion, [10,14] solidstate reaction, [15] etc. Notably, the combustion method was widely selected because of various advantages compared with other methods such as easy synthesis, energy saving, high purity, and good crystallinity.…”