Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1553086 | Superlattices and Microstructures | 2015 | 8 Pages |
Abstract
In this paper, we computationally evaluate the influence of nonlinear piezoelectricity in a recently reported hexagon shaped In0.25Ga0.75N/GaN disk-in-wire light emitting diode (LED). To calculate the single-particle electronic states and the interband optical transition rates, we have employed a fully atomistic valence force field (VFF)-sp3sâ tight-binding framework coupled with a recently proposed (first-principles based) polarization model from Prodhomme et al. (2013). The microscopically determined transition parameters are then incorporated into an LED simulator to investigate how atomicity, strain relaxation, and the net polarization field affect the internal quantum efficiency and lead to a degraded droop characteristic.
Related Topics
Physical Sciences and Engineering
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Authors
Vinay Uday Chimalgi, Md Rezaul Karim Nishat, Shaikh Shahid Ahmed,