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通过高孔注射核心/外结构实现由基矿产的高效白色电发光

Dongyu Li¹, Benzheng Lyu¹, Zhiwei Long¹

¹Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|April 1, 2025

概括

我们开发了新的以铜为基础的矿纳米晶体,加上硫化铜,显著提高了孔的移动性和光发光. 这一突破提高了白色矿发光二极管 (W-PeLED) 的效率和色彩染.

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:

基于铜的化佩洛夫斯基特提供环保,明亮的宽带辐射,适合白光应用.
这些材料的有限孔注入阻碍了白色矿发光二极管 (W-PeLED) 的效率.

研究的目的:

为了克服基于铜的矿中孔注射的限制,以提高W-PeLED的性能.
开发高效,无白色发光材料.

主要方法:

使用Cs₃Cu₂I₅核心和p型铜硫化物 (Cu₂S) 合成了与格子匹配的核心/外纳米晶体 (NC).
控制硫前体反应性,以实现所需的核心/外纳米结构.
使用工程 Cs₃Cu₂I₅/Cu₂S NCs.使用制造的 W-PeLED.

主要成果:

与原始的Cs₃Cu₂I₅/Cu₂S NC相比,Cs₃Cu₂I₅S NC显示出明显增强的孔移动性.
在Cu₂S上限后,光发光的量子产量从26.8%增加到70.6%.
在W-PeLED中实现了3.45%的外部量子效率和91的颜色染指数 (CRI).

结论:

与格子连接的Cu2S封顶有效地提高了基于Cs的材料中的孔移动性和发光.
开发的CsCu₂I₃/Cs₃Cu₂I₅/Cu₂S结构代表了无W-PeLED技术的重大进展.
为设计高性能宽带发光材料和PeLED设备提供了有效的策略.

关键词:

核心/外结构核心/外结构没有的矿.自己陷入的刺激子.白色发光二极管是一种白色发光二极管.

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P-N junction

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