WHITE LED
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United States of America Patent
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Mar 17, 2015
Grant Date -
Apr 2, 2015
app pub date -
Jan 2, 2014
filing date -
Oct 1, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A white LED is provided. The white LED includes a P-type layer, a tunneling structure, an N-type layer, an N-type electrode, and a P-type electrode. The tunneling structure is disposed over the P-type layer. The tunneling structure includes a first barrier layer, an active layer and a second barrier layer. The first barrier layer includes a first metal oxide layer. The active layer includes a second metal oxide layer. The second barrier layer includes a third metal oxide layer. The N-type layer is disposed over the tunneling structure. The N-type electrode and the P-type electrode are respectively contacted with the N-type layer and the P-type layer. An energy gap of the second metal oxide layer is lower than an energy gap of the first metal oxide layer and is lower than an energy gap of the third metal oxide layer.
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