Lighting communication device based on multiple electrodes and preparation method of device

Abstract

The invention relates to a lighting communication device based on multiple electrodes and a preparation method of the device. The device comprises an N type semiconductor layer, a multi-quantum well layer, an N electrode, a P type semiconductor layer and a P electrode; the P electrode comprises a P electrode inner ring and a P electrode outer ring; each of the inner ring and the outer ring comprises four electrode arc sections annularly and uniformly distributed on a P type layer from inside to outside; and the four electrodes work independently at the same time. The form that traditional electrodes are distributed in a single area is changed; the defect that current density is excessively concentrated is eliminated; the uniformity of current injected into an active region is improved; current diffusion uniformity is improved by increasing the current injected into the active region; the response rate of the device is improved; the signal-to-noise ratio of visible light communication as well as optical communication capacity and quality are improved; and illumination requirements are considered while communication rates are emphasized.

Description

technical field [0001] The invention relates to the field of lighting communication devices, in particular to a multi-electrode-based lighting communication device and a preparation method thereof. Background technique [0002] In traditional solid-state light-emitting devices, P-type nitrides have low conductivity, so the lateral diffusion of current on the surface of the P-type layer is much weaker than the vertical diffusion. In addition, the thickness of the P-type layer is limited, and often the current does not diffuse much in the lateral direction. Far has reached the active area, causing the recombination area is limited to the part of the active area below the electrode. The final result leads to uneven luminance of the device, low radiation recombination efficiency, uneven heat generation, etc., which seriously affects the performance of the device. [0003] The LED-based visible light communication technology combines the LED lighting function and the characteris...

AI Technical Summary

Problems solved by technology

At present, the modulation rate of light-emitting devices dual-purpose for lighting and communication is relatively low, and cannot respond to high-speed signals

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