材料科学
光电子学
发光二极管
表面等离子体子
局域表面等离子体子
表面等离子共振
量子效率
电压降
二极管
折射率
电介质
等离子体子
光学
纳米颗粒
纳米技术
电压
物理
量子力学
分压器
作者
Chun-Han Lin,Chia-Ying Su,Yang Kuo,Chung-Hui Chen,Yufeng Yao,Pei-Ying Shih,Horng-Shyang Chen,Chieh Hsieh,Yean‐Woei Kiang,C. C. Yang
摘要
Further reduction of the efficiency droop effect and further enhancements of internal quantum efficiency (IQE) and output intensity of a surface plasmon coupled, blue-emitting light-emitting diode (LED) by inserting a dielectric interlayer (DI) of a lower refractive index between p-GaN and surface Ag nanoparticles are demonstrated. The insertion of a DI leads to a blue shift of the localized surface plasmon (LSP) resonance spectrum and increases the LSP coupling strength at the quantum well emitting wavelength in the blue range. With SiO2 as the DI, a thinner DI leads to a stronger LSP coupling effect, when compared with the case of a thicker DI. By using GaZnO, which is a dielectric in the optical range and a good conductor under direct-current operation, as the DI, the LSP coupling results in the highest IQE, highest LED output intensity, and weakest droop effect.
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