“…54,60 ZTQ and NTQ phenomena were reportedly observed for a broad variety of phosphors doped with either a rare Earth ion(s), e.g. Eu 2+ , Eu 3+ , 78,79 Ce 3+ , 80 Tb 3+ , 81,82 Dy 3+ , 83,84 Tm 3+ , 84 Sm 3+ , 85 a transition metal ion, e.g., Mn 2+ , [86][87][88][89] Mn 4+ , 90,91 or an s 2 ion (Bi 3+ ), [92][93][94] when excited by an ultraviolet or a visible radiation. Despite considerable differences in type of the activator and/or host lattice as well as in the nature of the electronic transitions associated with the light absorption and emission processes for the above-mentioned phosphors, the explanations for NTQ and ZTQ in most of the papers were similar.…”