Nitride Light Emitting Diode
First Claim
1. A nitride light emitting diode, comprising:
- an n-type nitride layer;
a light emitting layer; and
a p-type nitride layer;
wherein;
the light emitting layer comprises a multiple quantum well (MQW) structure including a barrier layer and a well layer;
an AlGaN electron tunneling layer is inserted into at least one well layer adjacent to the n-type nitride layer with a barrier height greater than a height of the barrier layer;
a potential barrier height difference between the well layer and the AlGaN electron tunneling layer is sufficiently high such that electrons are difficult to transit through thermionic emission, but mainly transit through tunneling.
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Abstract
A nitride light emitting diode includes: an n-type nitride layer, a light emitting layer and a p-type nitride layer in sequence, wherein, the light emitting layer is a MQW structure composed of a barrier layer and a well layer, in which, an AlGaN electron tunneling layer is inserted into at least one well layer closing to the n-type nitride layer with barrier height greater than that of the barrier layer; in addition, the barriers of the AlGaN electron tunneling layer and the well layer are high enough so that electrons are difficult to transit towards thermionic emission direction, but mainly transit through tunneling in the InGaN well layers, which confines electron mobility and adjusts electron distribution. Hence, electrons have less chance to spill over into the P-type nitride layer.
15 Citations
20 Claims
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1. A nitride light emitting diode, comprising:
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an n-type nitride layer; a light emitting layer; and a p-type nitride layer; wherein; the light emitting layer comprises a multiple quantum well (MQW) structure including a barrier layer and a well layer; an AlGaN electron tunneling layer is inserted into at least one well layer adjacent to the n-type nitride layer with a barrier height greater than a height of the barrier layer; a potential barrier height difference between the well layer and the AlGaN electron tunneling layer is sufficiently high such that electrons are difficult to transit through thermionic emission, but mainly transit through tunneling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A light-emitting system comprising a plurality of nitride light emitting diodes (LEDs), each LED comprising:
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an n-type nitride layer; a light emitting layer; and a p-type nitride layer; wherein; the light emitting layer comprises a multiple quantum well (MQW) structure including a barrier layer and a well layer; an AlGaN electron tunneling layer is inserted into at least one well layer adjacent to the n-type nitride layer with a barrier height greater than a height of the barrier layer; a potential barrier height difference between the well layer and the AlGaN electron tunneling layer is sufficiently high such that electrons are difficult to transit through thermionic emission, but mainly transit through tunneling. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification