EMAIL THIS PAGE TO A FRIEND

Optics express

Performance improvement of GaN-based LEDs with step stage InGaN/GaN strain relief layers in GaN-based blue LEDs.


PMID 23571934

Abstract

The performance of nitride-based LEDs was improved by inserting dual stage and step stage InGaN/GaN strain relief layer (SRL) between the active layer and n-GaN template. The influences of step stage InGaN/GaN SRL on the structure, electrical and optical characteristics of GaN-based LEDs were investigated. The analysis of strain effect on recombination rate based k·p method indicated 12.5% reduction of strain in InGaN/GaN MQWs by inserting SRL with step stage InGaN/GaN structures. The surface morphology was improved and a smaller blue shift in the electroluminescence (EL) spectral with increasing injection current was observed for LEDs with step stage SRL compared with conventional LEDs. The output power of LEDs operating at 20 mA was about 15.3 mW, increased by more than 108% by using step stage InGaN/GaN SRL, which shows great potential of such InGaN/GaN SRL in modulating InGaN/GaN MQWs optical properties based on its strain relief function.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

57083
Indium, bars, 99.95%
In
264113
Indium, beads, diam. 2-5 mm, 99.999% trace metals basis
In
326607
Indium, beads, diam. 2-5 mm, ≥99.9% trace metals basis
In
357278
Indium, foil, thickness 1.0 mm, 99.999% trace metals basis
In
326631
Indium, foil, thickness 0.5 mm, 99.999% trace metals basis
In
357286
Indium, foil, thickness 0.5 mm, 99.99% trace metals basis
In
264040
Indium, foil, thickness 0.25 mm, 99.995% trace metals basis
In
357294
Indium, foil, thickness 0.25 mm, 99.99% trace metals basis
In
264059
Indium, foil, thickness 0.127 mm, 99.99% trace metals basis
In
357308
Indium, foil, thickness 0.1 mm, ≥99.995% trace metals basis
In
326615
Indium, pieces, 99.99% trace metals basis
In
203432
Indium, powder, −60 mesh, 99.999% trace metals basis
In
264032
Indium, powder, −100 mesh, 99.99% trace metals basis
In
277959
Indium, powder, 99.99% trace metals basis
In
385379
Indium, rod, diam. 10 mm, 99.9998% trace metals basis
In
264091
Indium, rod, diam. 6 mm, ≥99.999% trace metals basis
In
357065
Indium, wire, diam. 2.0 mm, 99.995% trace metals basis
In
340863
Indium, wire, diam. 1.5 mm, 99.99% trace metals basis
In
357073
Indium, wire, diam. 1.0 mm, 99.995% trace metals basis
In
264075
Indium, wire, diam. 1.0 mm, 99.99% trace metals basis
In
264067
Indium, wire, diam. 0.5 mm, 99.995% trace metals basis
In
326623
Indium, wire, diam. 0.25 mm, 99.999% trace metals basis
In