利用 Ba2MgTeO6 双包晶荧光粉的固有光致发光特性,实现从可见光到近红外的 PC-LED 应用

IF 3.3 3区 物理与天体物理 Q2 OPTICS
Nithin Jayan Suraja, Amrithakrishnan Bindhu, Sibi Kaithakkal Solaman, Subodh Ganesanpotti
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引用次数: 0

摘要

基于未掺杂碲酸盐双包晶石在可见光区域发光的磷光转换 LED(pc-LED)迄今为止尚未得到研究。本研究首次利用主Ba2MgTeO6双包晶石制造出了青色发光的pc-LED。制造出的青色 LED 在可见光区域发光,最大发射波长为 484 nm。获得的 CIE 坐标(0.26, 0.37)确保了青色光,即使在输入驱动电流较高的情况下,LED 也能表现出卓越的色彩稳定性。通过在 Ba2MgTeO6 基体中加入 Eu3+ 离子,尝试开发了一种白色发光荧光粉。随后,通过结合近紫外芯片和 BMTO: 0.02 Eu3+ 荧光粉,制造出了在蓝白色区域发光的荧光粉转换 LED。此外,还发现了 Ba2MgTeO6 中固有的近红外(NIR)发光现象,它源自 Te4+ 离子中的 3T1u、3A1u - 1A1g 电子跃迁。在 367 纳米波长的激发下,Ba2MgTeO6 显示出强烈的宽带近红外发射,波长从 780 纳米到 1150 纳米,最大发射波长为 889 纳米,半最大全宽(FWHM)约为 115 纳米。最后,利用在 Ba2MgTeO6 荧光粉中观察到的本征近红外发光,制造出了一种在近红外区域发射的高效 pc-LED。这种覆盖近红外区域的 pc-LED 可用于各种潜在应用,包括植物栽培、生物传感器、夜视摄像机等。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Harnessing the inherent photoluminescence of Ba2MgTeO6 double perovskite phosphor for visible to near infrared pc-LED applications

Phosphor-converted LEDs (pc-LEDs) emitting in the visible region based on undoped tellurate double perovskites have not been explored till now. A cyan-emitting pc-LED is fabricated using the host Ba2MgTeO6 double perovskite for the first time. The as-fabricated cyan LED emits light in the visible region with the maximum emission at 484 nm. The obtained CIE coordinates of (0.26, 0.37) ensure a cyan light, and LED exhibits superior color stability even at higher input drive current. An attempt to develop a white emitting phosphor was done by substituting Eu3+ ions into the Ba2MgTeO6 matrix. Followed by this, a phosphor converted LED emitting in the bluish white region was fabricated by combining near UV chip and BMTO: 0.02 Eu3+ phosphor. Further, an inherent near-infrared (NIR) luminescence in Ba2MgTeO6 is also discovered and it originates from the 3T1u, 3A1u1A1g electronic transitions within the Te4+ ions. Upon 367 nm excitation, Ba2MgTeO6 exhibits strong broadband NIR emission, which spans from 780 nm to 1150 nm with a maximum emission at 889 nm and full width at half maximum (FWHM) of about 115 nm. Finally, an efficient pc-LED emitting in the NIR region is fabricated using the intrinsic near-infrared luminescence observed in the Ba2MgTeO6 phosphor. The pc-LED covering the near infrared region can be potentially used for various applications, including plant cultivation, biosensors, night vision cameras, etc.

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来源期刊
Journal of Luminescence
Journal of Luminescence 物理-光学
CiteScore
6.70
自引率
13.90%
发文量
850
审稿时长
3.8 months
期刊介绍: The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.
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