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从兰化物氧化物LaGdO₃发出明亮的白光,用于Bi³⁺到Eu³⁺的LED照明,能量转移到Eu³⁺

Zhangyan Yang^1,2, Zeyu Lyu², Dashuai Sun²

¹School of Rare Earths, University of Science and Technology of China, Hefei 230026, P. R. China.

Dalton transactions (Cambridge, England : 2003)

|April 3, 2024

概括

研究人员使用LaGdO中的Bi3+和Eu3+离子之间的能量转移开发了新型白色发光. 这一突破使得高质量的白色LED (WLED) 具有可调色颜色和出色的色彩染.

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的.

背景情况:

开发高效的光剂对于高质量的白色发光二极管 (WLED) 来说至关重要.
来自的内在白光发射为WLED建造提供了一个有前途的途径.
能量转移机制是调整排放特性的关键.

研究的目的:

为了研究从Bi³⁺到Eu³⁺离子的能量转移,以发射白光.
为了合成和表征Bi³⁺-激活的LaGdO₃ (LGO) 合用Eu³⁺的.
探索这些光体在单元WLED设备中的潜力.

主要方法:

高温固态合成LaGdO₃:Bi³⁺,Eu³⁺ 的.
通过兴奋剂度对光发光特性和颜色调节的表征.
分析能量转移机制,特别是双极-双极相互作用.
使用近紫外线芯片和合成的光剂制造WLED设备.

主要成果:

LaGdO₃:Bi³⁺,Eu³⁺的排放颜色可以通过调整Bi³⁺/Eu³⁺的兴奋剂比来调整从色到白色到色红色.
通过双极双极相互作用观察到从Bi³⁺到Eu³⁺离子的能量转移的证据.
一个单元WLED设备实现了高颜色染指数92.4.4.
合成的体证明适用于近紫外线照明应用.

结论:

在Bi³⁺和Eu³⁺离子之间进行能量转移是实现单元白光发射的有效策略.
LaGdO₃:Bi³⁺,Eu³⁺是高性能WLED的有希望的候选材料.
这项研究为设计用于照明应用的新型光剂提供了宝贵的途径.

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