Yellow phosphors of high quantum yields excitable by both ultraviolet and blue light with Gd3BWO9 as the host

Presence of the irregular oxidation state of Bi4+ and single-element white emission in YAl3(BO3)4:Bi

“…The two excitation bands at 250–300 nm are attributed to the excitation transition of Bi. 16,20,21 The host material of YABO does not exhibit any emission, and thus the emission bands in the ranges of 350–500 nm, 500–590 nm and 590–750 nm are due to the Bi doping. Notably, in YABO, there is only one crystallographic site for Y/Bi, which is not expected to lead to three emission bands.…”

“…The two excitation bands at 250-300 nm are attributed to the excitation transition of Bi. 16,20,21 The host material of YABO does not exhibit any emission, and thus the emission bands in the ranges of 350-500 nm, 500-590 nm and 590-750 nm are due to the Bi doping.…”

Dual precipitating reagents-assisted deep blue-emitting borate and near-white oxide-based luminescent materials

“…[75][76][77][78] Quantum yield (QY; generally defined as the ratio of photons emitted to photons absorbed) is an essential parameter in evaluating fluorescent materials. 79 The quantum yield of the prepared sample ( particularly calcined at 1400 °C for 1 h and 1500 °C for 1-6 h) varied between ∼61% and ∼77% (Table 1). The value of QY was comparable to the literature and bulk Ce-doped YAG.…”