研究目的
Investigating the enhancement of luminous efficiency in GaN-based LEDs using a novel nano-grating structure based on surface plasmons.
研究成果
The proposed SPs-enhanced LED structure based on nano-gratings significantly improves luminous efficiency, with the luminous intensity increased to about 58.59 times compared with the ordinary structure and about 3.94 times compared with the reference structure. This structure enhances both the internal quantum efficiency and the external quantum efficiency of the LED.
研究不足
The study is based on simulation and does not include experimental validation. The effect of electrodes on luminous efficiency is not considered.
1：Experimental Design and Method Selection:
The study uses COMSOL software based on the finite element method to analyze and optimize the parameters of the proposed LED structure.
2：Sample Selection and Data Sources:
The structure includes n-GaN, multiple quantum wells, p-GaN, Ag–SiO2 grating, core–shell Ag/SiO2 nanoparticle, and ITO triangular grating.
3：List of Experimental Equipment and Materials:
Materials include GaN, SiO2, Ag, and ITO with specified refractive indices and permittivity.
4：Experimental Procedures and Operational Workflow:
The simulation involves setting scattering boundary conditions, perfect matching layer, and Floquet periodic boundary conditions to analyze electric field distribution, radiated, and absorbed intensity.
5：Data Analysis Methods:
The radiated and absorbed intensities are obtained by integrating the electric field mode of the air layer and Ag layer, respectively.
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