荧光粉
发光二极管
化学
光电子学
近红外光谱
红外线的
二极管
分析化学(期刊)
光学
材料科学
物理
色谱法
作者
Lu Fang,Liangliang Zhang,Hao Wu,Huajun Wu,Guohui Pan,Zhendong Hao,Feng Liu,Jiahua Zhang
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2022-06-01
卷期号:61 (23): 8815-8822
被引量:33
标识
DOI:10.1021/acs.inorgchem.2c00798
摘要
Broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are essential to integrate near-infrared spectrometers into mobile devices for the rapid and noninvasive detection of biological components. However, efficient broadband NIR phosphors with a peak emission wavelength longer than 800 nm are deficient. In this study, CaMgGe2O6:Cr3+ phosphor was prepared by a high-temperature solid-state reaction. The phosphor doped with 0.02Cr3+ showed an emission band at 845 nm with a broad bandwidth of 160 nm and a high quantum yield of 84% under 450 nm excitation. The broadband NIR pc-LED was fabricated using CaMgGe2O6:0.02Cr3+ phosphor based on a blue light-emitting diode (LED) chip. A photoelectric efficiency of 27.2% @ 10 mA and an NIR output power of 57.98 mW @ 100 mA were achieved, which are the highest values reported yet for broadband NIR pc-LEDs with a peak wavelength longer than 800 nm. Using the fabricated NIR pc-LED as the light source, the characteristic absorption spectra of some substances were obtained. All of the results indicated that the CaMgGe2O6:Cr3+ phosphor has considerable potential in near-infrared spectroscopic applications.
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