Organic light-emitting diode

1. An organic light-emitting diode, comprising:

a substrate, having a plurality of arced protrusions on a first plane thereof, wherein the refractive index of the arced protrusions is 1.3-1.9 such that the transmittance of an inner light is increased to about above 10% by the arced protrusions;

a first electrode, installed on a second plane of the substrate, wherein the second plane is opposed to the first plane;

an organic light-emitting layer, installed on the first electrode; and

a second electrode, installed on the organic light-emitting layer.

2. The organic light-emitting diode as claimed in claim 1 , wherein the height of the protrusions is about 4000˜8000 Å.

3. The organic light-emitting diode as claimed in claim 1 , wherein the width of the protrusions is about 3000˜7000 Å.

4. The organic light-emitting diode as claimed in claim 1 , wherein the contact angle between the arced protrusion and the substrate is not greater than about 90°.

5. The organic light-emitting diode as claimed in claim 1 , wherein the height of the protrusions is about 4000˜8000 Å, and the width of the protrusions is about 3000˜7000 Å.

6. An organic light-emitting diode, comprising:

a substrate, having a plurality of arced protrusions on a first plane thereof, wherein the height of the protrusions is about 4000˜8000 Å, and the width of the protrusions is about 3000˜7000 Å;

a first electrode, installed on a second plane of the substrate, wherein the second plane is opposed to the first plane;

an organic light-emitting layer, installed on the first electrode; and

a second electrode, installed on the organic light-emitting layer.