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MULTI-COLOR LIGHT EMITTING DEVICES WITH COMPOSITIONALLY GRADED CLADDING GROUP III-NITRIDE LAYERS GROWN ON SUBSTRATES
MULTI-COLOR LIGHT EMITTING DEVICES WITH COMPOSITIONALLY GRADED CLADDING GROUP III-NITRIDE LAYERS GROWN ON SUBSTRATES
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机译:基质上生长的复合梯度包覆第III族-氮化层的多色发光器件
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摘要
A light emitting device includes a substrate, multiple n-type layers, and multiple p-type layers. The n-type layers and the p-type layers each include a group III nitride alloy. At least one of the n-type layers is a compositionally graded n-type group III nitride, and at least one of the p-type layers is a compositionally graded p-type group III nitride. A first ohmic contact for injecting current is formed on the substrate, and a second ohmic contact is formed on a surface of at least one of the p-type layers. Utilizing the disclosed structure and methods, a device capable of emitting light over a wide spectrum may be made without the use of phosphor materials.
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