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相关概念视频

Biasing of P-N Junction01:16

Biasing of P-N Junction

529
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...
529

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在扩展周边LED中减少表面再组合,以实现电发光冷却.

Luc M van der Krabben1, Natasha Gruginskie1, Maarten van Eerden1

  • 1Institute for Molecules and Materials, Radboud University, 6525 AJ Nijmegen, The Netherlands.

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研究人员开发了一种新的化 (GaAs) 发光二极管 (LED) 设计,以减少表面重组造成的能量损失. 这种创新方法提高了内部量子效率,这对于电解发光冷却应用至关重要.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 半导体物理 半导体物理
  • 光电学是指光电子产品.

背景情况:

  • III-V半导体发光二极管 (LED) 是电光散发冷却的关键.
  • 实现高内部量子效率 (IQE) 对于有效的冷却至关重要.
  • 在设备周围的非辐射表面重组限制了GaAs LED中的IQE.

研究的目的:

  • 呈现一种非常规的LED设计,以减轻周边重组损失.
  • 为了提高GaAs/InGaP双异质连接LED的内部量子效率.
  • 为了提高半导体设备中电解发光冷却的潜力.

主要方法:

  • 制造p-i-n GaAs/InGaP双异质连接LED,尺寸和外围延伸不同.
  • 当前注射区域与装置周围之间的距离的系统变化.
  • 使用光子动力学模型来估计内部量子效率的变化.

主要成果:

  • 通过延长周边到接触距离,实现了外部量子效率 (EQE) 的19%的相对增加.
  • 由于减少周边重组,内部量子效率 (IQE) 的相对增加估计为5%.
  • 该设计成功地减少了周边重组,而不会影响最大电流密度.

结论:

  • 延长周边到接触距离是减少非辐射重组的有效策略.
  • 这种方法增强了IQE和EQE,推进了LED中的电光发光冷却.
  • 这些发现适用于其他半导体器件,其范围仅限于周边重组.