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构建宽带近红外石榴发射器CaGd2Ga4SiO12:Cr3+,具有单位量子效率和高热稳定性,用于多功能应用
Di Qian1, Yahong Jin1,2, Zhenzhang Li3
1School of Physics and Optoelectronic Engineering, Guangdong University of Technology, WaiHuan Xi Road, No. 100, Guangzhou, 510006, China.
Small (Weinheim an der Bergstrasse, Germany)
|February 5, 2025
概括
研究人员开发了一种新的花石,用于高效,稳定的宽带近红外 (NIR) 光. 这种新材料容纳离子,为先进的应用提供超宽带NIR发射.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 宽带近红外 (NIR) 光器对于下一代光源至关重要.
- 开发具有高热稳定性和超出830nm的效率的蓝光可激发光体具有挑战性.
研究的目的:
- 为高性能NIR光源设计和合成一种新的宽带NIR光.
- 为了研究 Cr3+ 合 CaGd2Ga4SiO12 石榴石的发光特性和热稳定性.
主要方法:
- 结构重建方法可以合成CaGd2Ga4SiO12:Cr3+石榴石.
- 由化学压力引起的Jahn-Teller扭曲,以实现超宽带NIR发射.
- 发光的特征,热稳定性和电子-声波合.
主要成果:
- 实现了超宽带NIR发射 (600-1300nm,中心为837nm),在半最大 (FWHM) 的全宽度为187-223nm.
- 获得了99.01%的最大内部量子效率 (IQE) 和出色的热稳定性 (90.37%在423K).
- 制造了一种NIR光转换发光二极管 (pc-LED),具有高输出功率 (287.7mW) 和功率转换效率 (PCE) (24.4%).
结论:
- 新型的CaGd2Ga4SiO12:Cr3+石榴石是一种有前途的宽带NIR光体.
- 微弱的电子 - 声波合和陷介导的能量补偿有助于热稳定性.
- 开发的pc-LED显示出在元件分析,近光成像和夜视等领域的应用潜力.
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