发光元件

Light-emitting element

Abstract

The present invention provides a light-emitting element comprising a first electrode, a conductive substrate, a metal reflecting layer, a p-type semiconductor layer, a light-emitting layer, an N-type semiconductor layer, three-dimensional log pile-shaped photonic crystals, and a second electrode, wherein the above parts are successively stacked up. Photonic band gaps exist among the three-dimensional log pile-shaped photonic crystals to limit the direction of light propagation. Based on the above design, the light is only enabled to propagate in the vertical direction, so that the loss of the light in the horizontal direction is avoided. The light emitting efficiency is improved. A fluorescent layer is added. The nano-phosphor powders of the fluorescent layer or the quantum dot florescent materials of the fluorescent layer are filled in the photonic band gaps. The light-emitting spectrum is modulated by the three-dimensional log pile-shaped photonic crystals. In this way, the light-emitting element is high in light-emitting efficiency and adjustable in color-changing temperature, and the color-rendering performance of the light-emitting element is improved.
本发明提供一种发光元件,包含一第一电极、一导电基板、一金属反射层、一P型半导体层、一发光层、一N型半导体层、一三维木堆状光子晶体,以及一第二电极,依序层叠配置。其中该三维木堆状光子晶体具有光子能隙,能限制光的传播方向,经由设计能让光只在垂直方向传播以避免水平方向光线的损失,提升其发光效率,另外还可加入一荧光层,该荧光层中的纳米荧光粉或量子点荧光材料填入该三维木堆状光子晶体间隙中,经由该三维木堆状光子晶体调变发光光谱,即可得到具有高发光效率及可调变色温的该发光元件,进而提升其演色性。

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