Luminescent properties and LED Application of Broadband Near-Infrared Emitting NaInGe2O6: Cr3+ phosphors

被引：72
作者：
Zhou, Weiying [1 ]
Luo, Jiabao [1 ]
Fan, Jiaqi [1 ]
Pan, Haowen [1 ]
Zeng, Senxiang [1 ]
Zhou, Liya [2 ]
Pang, Qi [2 ]
Zhang, Xinguo [1 ]
机构：
[1] Southern Med Univ, Sch Pharmaceut Sci, Guangdong Prov Key Lab New Drug Screening, Guangzhou 510515, Peoples R China
[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2021年 / 47卷 / 18期
基金：
中国国家自然科学基金;
关键词：
Phosphor; Indium germanate; NIR emitting; LEDs; ENERGY-TRANSFER; EMISSION; CE3+; EFFICIENT; DIODES;
D O I：
10.1016/j.ceramint.2021.05.256
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A NIR-emitting Cr3+-activated phosphors (NaInGe2O6: Cr3+) covering whole NIR-I region (700-1200 nm) were successfully designed and prepared via solid-state reaction. XRD and Rietveld refinement verified that the octahedral In3+ site is the preferred site of Cr3+ substitution in NaInGe2O6 structure. The synthesized NaInGe2O6: Cr3+ phosphors exhibit two strong absorption bands at 480 and 700 nm, and show a mountain-like single-band emission at 900 nm with FWHM = 175 nm. The crystal field parameters are calculated using steady-state spectral data, in which a low Dq/B value of 1.89 is obtained and results in this broadband NIR emission. NaInGe2O6: Cr3+ exhibits good emission thermal stability, i.e. 55 % of room temperature intensity at 373 K. Besides, an efficient NIR pc-LED is fabricated and shows NIR output of 25.2 mW@120 mA. This broadband NaInGe2O6: Cr3+ NIR phosphor could be merged into pc-LED package for hand-held spectrometers, security cameras and vivo biomarkers.
引用
收藏
页码：25343 / 25349
页数：7
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