Light-emitting devices with vertical light-extraction mechanism

摘要

A light-emitting device comprises a lattice structure to minimize the horizontal waveguide effect by reducing light traveling distance in the light-absorption medium of the light-emitting devices, and to enhance light extraction from the light-emitting layer. The lattice structure includes sidewalls and/or rods embedded in the light-absorption medium and dividing the light-absorption medium into a plurality of area units. The area units are completely isolated or partially separated from each other by the sidewalls. Also provided is a method of fabricating a light-emitting device that comprises a lattice structure, which lattice structure includes sidewalls and/or rods embedded in the light-absorption medium and dividing the light-absorption medium into a plurality of area units.

主权项

1. A light-emitting device comprising:
a n-type layer; a p-type layer; a light-emitting layer sandwiched between the n-type layer and the p-type layer; and a lattice structure comprising sheet-shaped sidewalls which penetrate the light-emitting layer but do not completely penetrate the p-type layer, and divide the light-emitting layer into a plurality of area units, wherein the area units are partially separated from each other by the sheet-shaped sidewalls, and an enclosure degree of the area units is equal to or higher than 20%, so that the area units are directly connected to their neighboring area units.