控制化佩洛夫斯基特发射器排放异构的策略,用于LED外增强

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Tommaso Marcato¹, Sudhir Kumar¹, Chih-Jen Shih¹

¹Institute for Chemical and Bioengineering, ETH Zürich, Zürich, 8093, Switzerland.

Advanced materials (Deerfield Beach, Fla.)

|December 16, 2024

概括

合物矿LED显示出很大的效率增长,但大部分光被捕获. 改善光外合的策略,特别是通过控制过渡双极时刻,可以显著提高设备性能.

科学领域:

材料科学材料科学材料科学
光电学是指光电子产品.
纳米技术纳米技术

背景情况:

化 PeroVskite (LHP) 发光二极管 (LED) 的重大进展使外部量子效率 (η_ext) 从0.1%提高到30%以上.
矿LED (PeLED) 具有100%的内部量子效率的潜力,因为自旋统计的限制较少.
一个主要的挑战仍然存在:70-85%的产生的光子通过基板,波导和 evanescent 模式被困在设备内.

研究的目的:

审查外在和内在的策略,以提高PeLEDs中的光脱效率 (η_out).
强调排放异构性在改善 η_out的作用.
讨论过渡双极时刻 (TDM) 定向对PeLED性能及其操纵的影响.

主要方法:

审查各种外部和内部光外合技术.
分析排放异构性及其与 η_out的相关性.
深入讨论LHP合性纳米晶体 (NCs) 自组装成超级晶格及其对光学性能的影响.

主要成果:

外部量子效率 (η_ext) 可以通过在矿发射器中诱导水平定向的TDM来提高50%.
控制TDM方向提供了一条途径,可以显著改善光子与空气的脱.
LHP NCs自组装成超格子会影响它们的排放异构性和光学特性.

结论:

优化光外合对于实现PeLEDs的全部潜力至关重要.
对TDM导向的战略操纵是提高PeLED效率的关键.
了解NC超级网格的形成对于定制光学特性和提高设备性能很重要.

关键词:

排放异型性是指排放异型性.发光二极管是一种发光二极管.外挂连接的效率效率是什么佩洛夫斯基特石的使用情况过渡二极点时刻过渡二极点时刻

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