超高亮度的微型LED具有晶圆尺度均的GaN-on-silicon epilayers 层层的光
Haifeng Wu1, Xiao Lin1,2, Qin Shuai1
1Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, School of Physics and Electronics, Hunan University, 410082, Changsha, China.
Light, science & applications
|October 9, 2024
概括
研究人员使用上化开发了高亮度绿色微型LED显示器. 这一突破克服了先进的微型显示器和虚拟现实应用的侧墙损坏和效率挑战.
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.
- 半导体设备 半导体设备
背景情况:
- 基于化 (GaN) 的微型发光二极管 (Micro-LED) 由于其高像素密度和亮度,对微型显示器和虚拟显示器充满希望.
- 小于10微米的微型LED面临的挑战包括侧墙损坏,有限的光提取效率,降低的光效率和亮度不均.
研究的目的:
- 报告高亮度的绿色微型显示器具有5μm像素.
- 为了应对小像素微型LED的技术挑战.
- 为了实现大量生产高亮度的微型LED显示器.
主要方法:
- 在具有低位移密度和高波长均性的基板上,晶圆尺度均的绿色GaN层的生长.
- 设计5微米绿色微型LED,使用垂直非对齐粘合技术.
- 应用原子侧墙被动化和湿处理以减轻侧墙损伤并增强光线提取.
主要成果:
- 在5微米绿色微型LED中实现超高亮度超过10^7cd/m^2.
- 展示了高质量的GaN-on-Si脱皮层,可扩展到6英寸大小,具有低位移密度 (5.25 × 10^8 cm^-2) 和最小的弓形 (16.7 μm).
- 成功集成了微型LED和基于Si的CMOS电路,用于1080 × 780分辨率的显示器.
结论:
- 开发的微型LED显示了报告中最高的亮度.
- 原子侧墙被动化和湿处理有效解决了侧墙损坏问题.
- 这项工作为大规模生产大尺寸GaN-on-Si晶片上的高亮度微型LED显示器提供了基础.
相关概念视频
01:16Biasing of P-N Junction
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
01:22MOSFET: Enhancement Mode
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...