范德瓦尔斯集成的单连接发光二极管在室温下超过10%的量子效率
Zhenliang Hu1, Qiang Fu1, Junpeng Lu1,2
1Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China.
Science advances
|October 2, 2024
概括
研究人员使用分层矿和石墨烯开发了微型发光二极管 (LED). 这些范德瓦尔斯LED (vdWLED) 在室温下实现高外部量子效率 (EQE) 超过10%,进步了芯片上的光电子.
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.
- 纳米技术 纳米技术
背景情况:
- 微型发光二极管 (LED) 对芯片上的光电子非常重要.
- 在室温LED中实现高外部量子效率 (EQE) 仍然是一个重大挑战.
研究的目的:
- 通过使用分层的拉德尔斯登 - 波珀矿 (RPPs) 来演示高性能微型LED.
- 调查范德瓦尔斯 (vdW) 集成在制造高效光电子设备方面的潜力.
主要方法:
- 使用干式传输VDW集成方法制造微型LED.
- 使用单晶分层RPP纳米片作为在几层石墨烯接触之间嵌入的活性层.
- 电光发光 (EL) 属性的表征,包括开启电流密度和EQE.
主要成果:
- 经过证明的范德瓦尔斯LED (vdWLED) 在室温下具有强烈的电解发光 (EL) 发射.
- 实现了低开启电流密度,大约为20 pA μm-2.2.
- 获得了高的外部量子效率 (EQE) 超过10%,为vdWLEDs设置了一个新的基准.
结论:
- 由于RPP的独特特性和通过Fowler-Nordheim道的高效充电注入,开发的vdWLED表现出高性能.
- 这项工作为在芯片上的光学应用程序创建高性能小型化光源提供了一个可扩展的途径.
更多相关视频
相关概念视频
P-N junction
480
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
480
The Ideal Diode
699
A diode is a semiconductor device that allows current to flow in one direction only, making it a crucial component in electronic circuits for controlling the direction of current flow. An ideal diode is a simplified version of a real diode used to understand how diodes work in circuits. It possesses two terminals: the positive anode and the cathode, which is negative. When a positive voltage is applied to the anode relative to the cathode, the diode is in a forward-biased state, allowing...
699
Schottky Barrier Diode
305
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
305


