A broadband near-infrared phosphor Ca3Y2Ge3O12:Cr3+ with garnet structure

被引：98
|
作者：
Mao, Ning [1 ]
Liu, Shengqiang [1 ]
Song, Zhen [1 ]
Yu, Yi [1 ]
Liu, Quanlin [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Municipal Key Lab New Energy Mat & Techno, Beijing 100083, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 863卷
基金：
中国国家自然科学基金;
关键词：
Ca3Y2Ge3O12:Cr3+; Garnet; Near-infrared emission; Temperature sensing; LIGHT-EMITTING-DIODES; PERSISTENT LUMINESCENCE; PHOTOLUMINESCENCE; SPECTROSCOPY; CONVERSION; STABILITY; EMISSION; RED; LU; GD;
D O I：
10.1016/j.jallcom.2021.158699
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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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页数：7
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