Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 24, Pages 34851-34859Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.09.026
Keywords
Near Infrared-II; Multi spectral responsive; Cr3+; Imaging; LED
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Funding
- Shandong Natural Science Foundation [ZR201808200024]
- Qingdao Postdoctoral Foundation [RZ1900013644]
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The study synthesized Cr3+ doped LiSeGe(2)O6 NIR phosphor, which emits NIR-II light in the range of 700-1400 nm. This phosphor has a broad absorption band and can be excited by light of different wavelengths.
Near-infrared (NIR) optical devices play an important role in non-destructive imaging and detection in vitro. In particular, the NIR-II light has a better penetration depth. Phosphor conversion-LED is a preferred light source, which is highly dependent on the quality of the NIR phosphor. In this work, Cr3+ doped LiSeGe(2)O6 NIR phosphor is synthesized and studied in detail. It can emit NIR-II light peaking at 926 nm at the range of 700-1400 nm, which covers NIR-I area and extends to NIR-II area with D-q /B = 1.69 of Tanabe-Sugano diagram. This phosphor has a very broad absorption band and can be excited by UV, blue, 660, and 808 nm light, respectively. The fabricated NIR LED using our Cr3+ doped LiSeGe2O6 phosphor excited by blue chip can penetrate the palm and 1.5 cm pork meat effectively. NIR-II emission with multi spectral responsive in Cr3+ doping inorganic LiSeGe2O6 based matrix is achieved for the first time.
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