High efficency LED structure

Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With heterojunction

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257 95, H01L 3300

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active

056147341

ABSTRACT:
An LED structure including a distributed Bragg reflector having multiple periods, each period including at least a first layer made of a first indirect band gap material and a second layer made of a second indirect band gap material, the first band gap material having a higher index of refraction than the second indirect band gap material; and a light emitting diode formed on top of the distributed Bragg reflector, the light emitting diode having a top layer and a bottom layer, the bottom layer being proximate to the distributed Bragg reflector.

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