“…The inorganic LPL phosphor based on rare-earth (RE) element doping was first presented in the 1960s mainly for lamps and cathode-ray tubes. , In the mid-1990s, RE-codoped LPL phosphor, SrAl 2 O 4 :Eu 2+ /Dy 3+ , effectively prolonged the persistent luminous time to 2000 min . Nowadays, the majority of high-performance LPL materials are based on doped inorganic oxides, such as Ca 2 Al 2 SiO 7 :Pr 3+, SrAl 2 O 4 :Eu 2+ /Dy 3+, Li 2 ZnGeO 4 :Mn 2+ , and a series of other inorganic oxides. − The fabrication of these materials requires a complex crystal growth process under harsh conditions (>1000 °C) for 2–5 h to generate efficient electron-trapping states in host lattices. To reduce the reaction temperature, the sol–gel method (>500 °C) , and hot injection for inorganic oxide NCs (∼300 °C) − were both developed.…”