Journal
OPTICAL MATERIALS EXPRESS
Volume 5, Issue 5, Pages 963-968Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.5.000963
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- JSPS KAKENHI [25620184]
- Grants-in-Aid for Scientific Research [25620184] Funding Source: KAKEN
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We developed bright deep-red persistent phosphors of Cr3+-Eu3+ co-doped Gd3Al5-xGaxO12 garnet (GAGG:Cr3+-Eu3+), in which only Cr3+ ion shows emission bands centered at 730 nm after ceasing UV illumination and Eu3+ ion acts as an excellent electron trap capturing one electron to be Eu2+ with tunable trap depth by varying conduction band with Ga3+ content, x. The persistent radiance of the GGG:Cr3+-Eu3+ (x = 5) sample at 1 h after ceasing UV light is approximately 25 times higher than that of the Cr3+ singly doped GGG sample, and is over 6 times higher than that of the widely used ZnGa2O4:Cr3+ red persistent phosphor. (C)2015 Optical Society of America
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