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Enhancement in light emission efficiency of Si nanocrystal light-emitting diodes by a surface plasmon coupling

机译:通过表面等离子体激元耦合提高Si纳米晶体发光二极管的发光效率

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摘要

We report an enhancement in light emission efficiency form Si nanocrystal (NC) light-emitting diodes (LEDs) via surface plasmons (SPs) by employing Au nanoparticles (NPs). Photoluminescence intensity of Si NCs with Au NPs was enhanced by 2 factors of magnitude due to the strong coupling of Si NCs and SP resonance modes of Au NPs. The electrical characteristics of Si NC LED were significantly improved, which was attributed to an increase in an electron injection into the Si NCs due to the formation of inhomogeneous Schottky barrier at the SiC-indium tin oxide interface. Moreover, light output power from the Si NC LED was enhanced by 50% due to both SP coupling and improved electrical properties. The results presented here can provide a very promising way to significantly enhance the performance of Si NC LED.
机译:我们报告通过采用Au纳米粒子(NP)通过表面等离激元(SP)形成Si纳米晶体(NC)发光二极管(LED)的发光效率增强。由于Si NCs和Au NPs的SP共振模式之间的强耦合,具有Au NPs的Si NCs的光致发光强度提高了两个数量级。 Si NC LED的电特性得到了显着改善,这归因于由于在SiC-铟锡氧化物界面处形成了不均匀的肖特基势垒,增加了向Si NC中注入电子的能力。此外,由于SP耦合和改善的电性能,Si NC LED的光输出功率提高了50%。此处提供的结果可以提供一种非常有前途的方法,可以大大提高Si NC LED的性能。

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  • 来源
    《Applied Physics Letters》 |2012年第18期|p.1-5|共5页
  • 作者

    Huh Chul;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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