Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 863, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.158699
Keywords
Ca3Y2Ge3O12:Cr3+; Garnet; Near-infrared emission; Temperature sensing
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Funding
- National Natural Science Foundation of China [51972020, 51832005]
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The study successfully synthesized a garnet-type NIR phosphor with weak crystal field strength and excellent luminescent properties, providing a good choice of phosphor for NIR LED devices.
Near-infrared phosphor (NIR) integrated light-emitting diode (LED) has ideal application prospects in the fields of food inspection and medical imaging. Herein, we have synthesized a garnet-type Ca3Y2Ge3O12:Cr3+ NIR phosphor using solid state reaction method. Broadband NIR emission ranging from 700 to 1100 nm with a peak located at 800 nm indicates a weak crystal field strength for Cr3+, which occupies the six-coordinated Y3+ site. Moreover, the phosphor has satisfactory luminous intensity showing 81%/10% internal/external quantum efficiency and excellent luminescence thermal stability. Our work provides an excellent NIR phosphor choice for NIR LED devices. (C) 2021 Elsevier B.V. All rights reserved.
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