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Near-infrared (NIR) persistent luminescent β-Ga 2 O 3 :Cr 3+ nanowire assemblies were synthesized by a hydrothermal process followed by calcination. The phosphor exhibits more than 4h afterglow in the wavelength range of 650–850nm after ceasing the ultraviolet light (280–360nm) irradiation. The trap structure and persistent luminescence mechanism were revealed by thermoluminescence...
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