V-shaped-pit-based non-fluorescent-powder GaN-based white-light LED epitaxial structure and preparation method thereof
A technology with no phosphor powder and epitaxial structure, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of LED luminous efficiency decline and phosphor powder conversion efficiency, and achieve the effect of avoiding a sudden drop in efficiency
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[0027] This embodiment provides a V-shaped pit-based epitaxial structure of a phosphor-free GaN-based white light LED, such as figure 1 As shown, the structure includes a substrate, a nucleation layer formed on the substrate, an undoped GaN layer, an n-type GaN layer, a low-temperature n-type GaN layer, an InGaN / GaN multiple quantum well layer, a p-type GaN layer.
[0028] As an embodiment of the present invention, in this embodiment, the thickness of the non-doped GaN layer is 2 μm; the thickness of the n-type GaN layer is 2 μm; the thickness of the low-temperature n-type GaN layer is 100 nm, and the growth temperature is 830°C; The InGaN / GaN multi-quantum well layer has six well barrier periods, the thickness of the well layer is 2 nm, the growth temperature is 650 °C, the In composition is 25%, the thickness of the well layer is 10 nm, and the growth temperature is 800 °C; p-type GaN The thickness of the layer is 2 μm. As an alternative embodiment of the present invention...
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