发明授权
US08629457B2 Light-emitting device 有权
发光装置

Light-emitting device
摘要:
A silicon carbide substrate has a first layer facing a semiconductor layer and a second layer stacked on the first layer. Dislocation density of the second layer is higher than dislocation density of the first layer. Thus, quantum efficiency and power efficiency of a light-emitting device can both be high.
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