非常明亮和稳定的无双矿白色发光二极管
Shilin Jin1, He Yuan1, Tao Pang2
1College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian, 350117, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 2, 2023
概括
这项研究通过使用 terbium 兴奋剂和客宿主策略来增强白色LED 的无双矿. 这提高了效率和亮度,为稳定,高效的照明应用实现了创纪录的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 光电学是指光电子产品.
背景情况:
- 无双矿 (DPs) 显示出作为具有高效光发光 (PL) 的稳定发射器的前景.
- 然而,低电解发光效率 (EL) 仍然是它们在白色发光二极管 (wLED) 中应用的重大挑战.
研究的目的:
- 为了提高基于DP的wLED的外部量子效率 (EQE) 和亮度.
- 为了解决双矿材料中低EL效率的局限性.
主要方法:
- 对Cs2Na0.4Ag0.6In0.97Bi0.03Cl6 DP进行胺注,以防止银的形成和限制刺激子.
- 一个客家主机策略,以增强电影形态,减少缺陷,并提高载体的移动性.
- 加入绿色碳点来优化白光光谱.
主要成果:
- 实现了0.76%的EQE和2793cd m-2的亮度为基于DP的wLED.
- 证明了增强的自我被困刺激子 (STE) 辐射重组和充电注入效率.
- 获得了纯白色的电发光,具有理想的颜色坐标 (0.328,0.329).
结论:
- 结合了 terbium 兴奋剂和客主策略的结合方法,显著提高了 wLED 的性能.
- 这些修改导致STE辐射重组和充电注入的实质性改进.
- 开发的wLED显示了创纪录的光电子性能和稳定,高效的白光发射.
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