高效的蓝色InGaN纳米级发光二极管
Mihyang Sheen1, Yunhyuk Ko2, Dong-Uk Kim2
1Samsung Display, Yongin-si, Republic of Korea. mihyang.sheen@samsung.com.
Nature
|August 3, 2022
概括
研究人员开发了高效的蓝色化 (InGaN) 纳米LED (nLED),以克服较小的微型LED显示器的性能下降. 这一突破为纳米级LED实现了最高的外部量子效率,
科学领域:
- 光电子产品
- 材料科学
- 纳米技术
背景情况:
- 基于化 (InGaN) 的微LED (μLED) 提供了高级显示器的高效率,亮度和稳定性.
- 对于μLED来说,一个重要的挑战是随着设备尺寸的减少,外部量子效率 (EQE) 的下降.
- 对于下一代显示技术来说,解决这种依赖于尺寸的EQE减少至关重要.
研究的目的:
- 为了证明一个蓝色的InGaN/GaN多重量子井 (MQW) 纳米光灯 (nLED) 具有高的EQE.
- 调查和克服较小尺寸LED中减少EQE的问题.
- 探索 GaN 表面和侧墙被动化层之间的相互作用,以尽量减少缺陷.
主要方法:
- 蓝色InGaN/GaN MQW纳米光灯 (nLED) 的制造
- 对GaN表面和被动化层之间的相互作用进行分析,重点是最小化点缺陷.
- 使用SiO2纳米颗粒的sol-gel方法进行有效的GaN表面被动化.
主要成果:
- 在制造的nLED中达到20.2 ± 0.6%的高外部量子效率 (EQE).
- 显示了纳米级LED所报告的最高EQE.
- 在被动化过程中确定最小化点缺陷对于高性能nLED至关重要.
结论:
- 溶凝消极化方法有效地减少了GaN表面的原子相互作用,减少了缺陷.
- 开发的nLED显示出优越的EQE,克服了大小依赖的效率下降.
- 这项工作可以制造自发的nLED显示器,这是未来显示器的关键技术.
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