A 3 W High-Voltage Single-Chip Green Light-Emitting Diode with Multiple-Cells Network

الملخص EN

A parallel and series network structure was introduced into the design of the high-voltage single-chip (HV-SC) light-emitting diode to inhibit the effect of current crowding and to improve the yield.

Using such a design, a 6.6×5 mm2 large area LED chip of 24 parallel stages was demonstrated with 3 W light output power (LOP) at the current of 500 mA.

The forward voltage was measured to be 83 V with the same current injection, corresponding to 3.5 V for a single stage.

The LED chip’s average thermal resistance was identified to be 0.28 K/W by using infrared thermography analysis.