用于夜视照明、非视觉检测和生物成像的长波近红外 MgIn2O4:Ni2+ 磷光体，具有 47.93% 的 IQE 和 34.66% 的 EQE

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-09-03 DOI:10.1021/acsmaterialslett.4c01062

Fengmei Zhu, Yu Deng, Yuan Gao, Jianbei Qiu

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引用次数: 0

摘要

目前，波长在 ∼1500 nm 以上的宽带长波长近红外荧光粉转换发光二极管（LWNIR pc-LED）的选择非常有限，而且大多数 LWNIR 荧光粉的发光量子效率较低。本文采用高温固态反应法制备了掺杂 Ni2+ 的 MgIn2O4 反硒荧光粉。在 365 nm 激发下，它们在 1200-2100 nm 范围内呈现宽带 LWNIR 发射，发射峰为 ∼1490 nm，半最大全宽为∼313 nm，这表明[MgO6] 八面体中心周围存在电子极化程度高的弱晶体场环境。MgIn2O4:Ni2+ 荧光粉的 IQE 和 EQE 分别为 ∼47.93% 和 ∼34.66%。将优化的荧光粉与 LED 芯片封装在一起，就得到了用于夜视照明、非视觉检测和生物成像的 LWNIR pc-LED 器件。我们的研究结果证实，与传统的高能射线成像技术相比，基于低温近红外照明的成像技术具有明显的安全优势。

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Long-Wavelength Near-Infrared MgIn2O4:Ni2+ Phosphor with 47.93% IQE and 34.66% EQE for Night Vision Lighting, Nonvisual Detection, and Biological Imaging

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Long-Wavelength Near-Infrared MgIn2O4:Ni2+ Phosphor with 47.93% IQE and 34.66% EQE for Night Vision Lighting, Nonvisual Detection, and Biological Imaging

Presently, there are very limited options for a broad-band long-wavelength near-infrared phosphor-converted light-emitting diode (LWNIR pc-LED) with wavelengths above ∼1500 nm, and most LWNIR phosphors have a low luminescence quantum efficiency. Here, Ni²⁺-doped MgIn₂O₄ antispinel phosphors were prepared by a high-temperature solid-state reaction method. Under 365 nm excitation, they exhibited broad-band LWNIR emission in the range of 1200–2100 nm, with an emission peak of ∼1490 nm and a full width at half-maximum of ∼313 nm, indicating a weak crystal field environment with high electron polarization around the center of the [MgO₆] octahedron. The IQE and EQE of MgIn₂O₄:Ni²⁺ phosphors were ∼47.93% and ∼34.66%, respectively. The optimized phosphor was encapsulated with an LED chip to obtain a LWNIR pc-LED device for night vision lighting, nonvisual detection, and biological imaging. Our results confirmed that LWNIR lighting based imaging technology showed clear safety advantages over traditional high-energy ray imaging.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.