Photonic Devices with Embedded Hole Injection Layer to Improve Efficiency and Droop Rate
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United States of America Patent
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Issued Date -
Mar 20, 2014
app pub date -
Sep 14, 2012
filing date -
Sep 14, 2012
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Abstract
The present disclosure involves a light-emitting device. The light-emitting device includes an n-doped gallium nitride (n-GaN) layer located over a substrate. A multiple quantum well (MQW) layer is located over the n-GaN layer. An electron-blocking layer is located over the MQW layer. A p-doped gallium nitride (p-GaN) layer is located over the electron-blocking layer. The light-emitting device includes a hole injection layer. In some embodiments, the hole injection layer includes a p-doped indium gallium nitride (p-InGaN) layer that is located in one of the three following locations: between the MQW layer and the electron-blocking layer; between the electron-blocking layer and the p-GaN layer; and inside the p-GaN layer.
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