Effect of scattering from localized surface plasmon resonance on improving the luminescence efficiency of silicon nitride light-emitting devices

Effect of scattering from localized surface plasmon resonance on improving the luminescence efficiency of silicon nitride light-emitting devices
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局域表面等离子体共振散射对提高氮化硅发光器件发光效率的影响

DOI:
10.1007/s11051-013-1419-6
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发表时间:
2013-01
影响因子:
2.5
通讯作者:
Deren Yang
Deren Yang
中科院分区:
材料科学4区
文献类型:
--
作者:
Feng Wang;Changrui Ren;Dongsheng LI;Deren Yang

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我们展示了局域表面等离子体共振增强富硅氮化硅基发光器件通过嵌入之间的硅衬底和发光矩阵的银纳米结构。通过这些插入的银纳米结构实现了约30倍的外量子效率增强。我们将这种明显的增强主要归因于通过添加银纳米结构改善的背散射和载流子注入。局域表面等离子体激元与激子之间的耦合以及ITO电极表面粗糙化增加光提取也有助于增强电致发光强度和效率。
We demonstrate the localized surface plasmon resonance enhanced silicon-rich silicon nitride based light-emitting devices by embedding the silver nanostructures between the silicon substrate and luminescent matrix. An about 30 times enhancement of external quantum efficiency is achieved by these inserted silver nanostructures. We attribute this distinct enhancement mainly to the improved back-scattering and carrier injection by the addition of silver nanostructures. The coupling between localized surface plasmons and excitons as well as the increase of light extraction via the surface roughening of ITO electrode also contributes to the enhancement of electroluminescence intensity and its efficiency.
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