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通过引入氧气空缺来增强结合的Er³⁺和BaTiO₃的上转换

Young Gwon Jung¹, Hyeongyu Bae¹, Kang Taek Lee¹

¹Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea. ktlee@gist.ac.kr.

Physical chemistry chemical physics : PCCP

|November 28, 2023

概括

将氧气空缺引入化物合的晶体,显著提高了转化效率. 这项研究表明,通过控制氧气空缺来改善材料应用,Er³⁺被合的BaTiO₃增强了多达三倍.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
光物理学的光学物理学

背景情况:

兰化物合的晶体呈现上升转换 (UC),将近红外 (NIR) 光转换为紫外线可见光 (UV-Vis).
有限的量子效率 (∼3%) 限制了上转换材料的实际应用.
修改晶体位点对称性是一种已知的提高UC效率的策略.

研究的目的:

为了研究氧空缺 (O_V) 对Er³⁺-doped BaTiO₃ (E-BT) 晶体上升转换效率的影响.
探索O_V度和UC增强之间的关系.
了解O_V如何影响晶体结构和对称性.

主要方法:

在E-BT晶体中通过热处理后引入氧气空缺.
火时间系统地变化以控制O_V的度.
测量了上转换的发光度,以量化效率的变化.

主要成果:

为了最大限度地提高O_V生成,发现了6小时的最佳火时间.
与原始晶体相比,具有O_V的EBT晶体显示UC效率增加了三倍.
加强UC的程度与O_V内容直接相关.

结论:

氧气空缺有效地提高了EBT晶体的向上转换效率.
引入O_V可能会在晶格中诱导局部对称性变化.
控制O_V为开发高效的升级转换材料提供了一个有希望的途径.

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