| 摘要 |
A light emitting device with an ultraviolet light-emitting structure having a first layer with a first conductivity, a second layer with a second conductivity; and a light emitting quantum well region between the first layer and second layer. A first electrical contact is in electrical connection with the first layer and a second electrical contact is in electrical connection with the second layer. A template serves as a platform for the light-emitting structure. The template has a micro-undulated buffer layer with AlxInyGa1-x-yN, wherein 0 < x =1, 0 = y =1 and 0 < x+y =1, and a second buffer layer over the micro-undulated buffer layer. The second buffer layer is made of AlxInyGa1-x-yN, wherein 0 <x =1, 0 = y = 1, 0 < x+y = 1. When an electrical potential is applied to the first electrical contact and the second electrical contact the device emits ultraviolet light.
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