Light-emitting element with transparent conducting layer with gradually-changed thickness and preparation method of light-emitting element

Abstract

The invention relates to a light-emitting element with a transparent conducting layer with gradually-changed thickness and a preparation method of the light-emitting element. The light-emitting element comprises a substrate, and an epitaxial structure, a transparent conductive layer and an electrode which are positioned on the surface of one side of the substrate, wherein the thickness of the transparent conductive layer is gradually increased / decreased from a current injection point to the edge or the periphery. The thickness of the transparent conductive layer is gradually increased / decreased from a current injection point (the center of a positive electrode or an inverted through hole) to the edge or the periphery, so that the corresponding change of square resistance is realized, and instantaneous thermal aggregation and series resistance voltage drop caused by the increase of the input size of current and a transmission path under different structure applications are actively compensated; therefore, the current is driven to transversely extend to the active region of the whole chip more uniformly and more quickly. According to the invention, by introducing the transparent conductive layer structure with the gradual thickness, the jump from passive uniform conduction to active gradient regulation is realized, and the aspects of light emitting uniformity, photoelectric efficiency, device reliability and the like are qualitatively improved.

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