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相关概念视频

Biasing of P-N Junction01:16

Biasing of P-N Junction

868
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...
868

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为了高效和明亮的量子棒LED,逆向设备工程.

Zebing Liao1,2, Maksym F Prodanov1,2, Mallem Kumar1,2

  • 1State Key Laboratory of Displays and Optoelectronics, Department of Electronics and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, 999077, P. R. China.

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概括

研究人员通过对齐量子棒和重新设计设备结构来改进量子棒发光二极管 (QR-LED). 这大大减少了载体泄漏,并提高了外部量子效率 (EQE),从而实现更明亮,更高效的显示器.

关键词:
QLED QLED 是一个不同类型的发射器发射器设备工程 设备工程显示器显示显示器显示显示器.量子棒发光二极管是一种量子棒发光二极管.

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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:

  • 量子点发光二极管 (QD-LED) 接近理论上的外部量子效率 (EQE) 极限.
  • 进一步的改进需要新的光学设计,如微腔或双极定向调.

研究的目的:

  • 为了提高量子棒发光二极管 (QR-LED) 的性能.
  • 为了解决传统QR-LED结构中的载体泄漏问题.
  • 在LED应用中探索异型纳米晶体的潜力.

主要方法:

  • 通过形状诱导的水平自我调整,在红棒-在-棒量子棒 (QRs) 中实现了高内平面双极方向 (82%).
  • 利用同等电路模型来识别和说明载体泄漏影响.
  • 改变了QR-LED设备结构,以平衡载体注入和抑制泄漏.

主要成果:

  • 开发了红色QR-LED,其峰值EQE为31%和110,000 cd/m2的亮度.
  • 展示了绿色点在杆的QR-LED,其峰值EQE为20.2%,发光量为250,000cd/m2.
  • 同时成功抑制载体泄漏和改善载体注入.

结论:

  • 形状诱导自我调整和设备重新设计是提高QR-LED性能的有效策略.
  • 这项工作为使用异型纳米晶体改善LED性能提供了一条途径.
  • 开发的QR-LED显示出下一代显示技术的巨大潜力.