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| Research on Parameter Optimization of LED Based on Surface Plasmons |
| LI Zhi-quan,WEI Wen-jing |
| School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract In order to effectively improve the luminous efficiency of GaN-based blue light-emitting diodes, a composite grating GaN-LED structure based on surface plasmon is proposed. Through the theoretical analysis of the excitation mode of surface plasmons and the quantum efficiency of the internal and external LEDs, the principle of the structure to enhance the luminous efficiency of LEDs is explained in detail. The fabrication process of the model is discussed. At the same time, the finite element analysis method is used to optimize the parameters and simulate the structure, thus the radiation power, absorption power and electric field distribution of the structure under the optimal parameters are obtained. The simulation results show that when the wavelength of the emitted light is 460nm, under the optimal parameters, the average electric field radiated into the air of the composite grating LED structure is 38 times that of the single-grating LED structure, which proves that the proposed structure can effectively improve the luminous efficiency of the diode.
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Received: 08 November 2019
Published: 28 August 2020
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2020, Vol. 41 
