Project Details
Projekt
Advanced Electro-Optical Modeling of III-Nitride Light Emitters
Applicant
Professor Dr. Bernd Witzigmann
Subject Area
Theoretical Condensed Matter Physics
Term
from 2008 to 2016
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 48042628
As part of the research group POLARCON, we intend to study the active region carrier dynamics in III-nitride light emitting devices using quantum-mechanical non-equilibrium models, such as an empirical scattering theory or the non-equilibrium Green's function method (NEGF). This method is applied to the analysis of active regions for III-nitride light emitters with different crystal orientations for the first time. It will overcome the limits of present simulation methods, such as lack of tunneling currents and thermally activated currents from nonequilibrium carrier distributions in the presence of radiative and non-radiative recombination. Using this model, we plan to improve the understanding of lasers and light emitting diodes (LEDs) for polar, semi-polar and non-polar configurations, in particular electro-optical efficiencies and threshold current densities. In collaboration with the partners of the research group, the results will be compared to experimental data in order clarify the fundamental carrier transport related effects in a III-nitride active region for optoelectronics. In the consortium, strategies will be developed in order to design active regions with highest performance. In addition, device design aspects of all partner projects will be supported with our state of the art modeling tools.
DFG Programme
Research Units
