基于矿量子点在矿矩阵中的明亮和稳定的发光二极管
Yuan Liu1, Yitong Dong1, Tong Zhu1
1Department of Electrical and Computer Engineering, University of Toronto, 35 St. George Street, Toronto, Ontario M5S 1A4, Canada.
Journal of the American Chemical Society
|September 20, 2021
概括
稳定的矿量子点 (QD) 为增强的发光二极管 (LED) 开发. 这些新的QD提高了设备的寿命和高亮度的性能,克服了以前的稳定性挑战.
科学领域:
- 材料科学
- 量子点技术
- 光电子产品
背景情况:
- 金属化物矿量子点 (QD) 为发光二极管 (LED) 提供了高效率.
- 设备寿命受到QD不稳定性和高亮度效率下降的限制.
- 表面被动化和激子封闭对于稳定的QD性能至关重要.
研究的目的:
- 开发稳定的矿量子点 (QD),以提高LED的性能和使用寿命.
- 为了克服矿QD中的化学不稳定性的挑战,
- 为了实现高亮度,长时间的红色LED.
主要方法:
- 在半导体外内使用应变的QD作为核化中心进行QD的接.
- 在QDs周围的矿基质的均结晶.
- 用于有效接受电荷和辐射排放的I型带对齐.
主要成果:
- 在矿基层中开发出稳定的矿QD.
- 在高激发时显示抑制的奥格尔双激发重组和明亮的发光.
- 在具有高性能保留率 (> 4700 cd m-2) 的主红色LED中实现了18%的外部量子效率.
结论:
- 新的矿QD材料显著提高了LED的稳定性和使用寿命.
- 与以前的红色矿LED相比,其半衰期提高了100倍 (2400小时在100cdm-2下).
- 这种进步使得高性能,耐用的矿量子点发光二极管成为可能.
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