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  • Photostimulated near-infrared persistent luminescence as a new optical read-out from Cr³⁺-doped LiGa₅O₈.

Photostimulated near-infrared persistent luminescence as a new optical read-out from Cr³⁺-doped LiGa₅O₈.

Scientific reports (2013-03-28)
Feng Liu, Wuzhao Yan, Yen-Jun Chuang, Zipeng Zhen, Jin Xie, Zhengwei Pan
摘要

In conventional photostimulable storage phosphors, the optical information written by x-ray or ultraviolet irradiation is usually read out as a visible photostimulated luminescence (PSL) signal under the stimulation of a low-energy light with appropriate wavelength. Unlike the transient PSL, here we report a new optical read-out form, photostimulated persistent luminescence (PSPL) in the near-infrared (NIR), from a Cr(3+)-doped LiGa₅O₈ NIR persistent phosphor exhibiting a super-long NIR persistent luminescence of more than 1,000 h. An intense PSPL signal peaking at 716 nm can be repeatedly obtained in a period of more than 1,000 h when an ultraviolet-light (250-360 nm) pre-irradiated LiGa₅O₈:Cr(3+) phosphor is repeatedly stimulated with a visible light or a NIR light. The LiGa₅O₈:Cr(3+) phosphor has promising applications in optical information storage, night-vision surveillance, and in vivo bio-imaging.

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铬, chips, 99.995% trace metals basis
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铬, powder, ≥99% trace metals basis, <45 μm
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铬, powder, 99.5%, −100 mesh
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铬, chips, thickness ~2 mm, 99.5%
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铬, sputtering target, diam. × thickness 3.00 in. × 0.125 in., 99.95% trace metals basis