In:
Applied Physics Letters, AIP Publishing, Vol. 95, No. 24 ( 2009-12-14)
Abstract:
Multi-layer barrier structure is suggested as an alternative approach to single-layer polarization matching barrier structure for the reduction of efficiency droop. Time resolved photoluminescence measurement showed that polarization field was reduced by 19% in the multilayer barrier light emitting diodes structures. Optical power measurements on packaged devices showed overall increase of external quantum efficiency for all currents up to the current density of 150 A/cm2. Increase of optical power is attributed to reduced polarization and decreased current overflow to p-side cladding layers. These results provide additional evidences that polarization is important in addressing the droop problem.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2009
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0