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PhD position: Theory of nitride-based semiconduc ... (No replies)
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Tyndall National Institute at University College Cork invites applications for a PhD position. The research is mainly theory-driven, spanning basic science through to investigations of fundamental processes in nitride-based semiconductor heterostructures affecting efficient light emission in the ultraviolet (UV) spectral range. Close collaboration with experimental partners within the Science Foundation Ireland funded Irish Photonic Integration Centre (IPIC) will be a central part of this project.
Here, atomistic but also continuum-based analysis will be carried out to study radiative and potentially also non-radiative processes in nitride-based nanostructures for optoelectronic device applications. This work will be accompanied by experimental studies from partners within IPIC, providing input and benchmarking of the calculations. Finally, design and modelling of new and optimized devices will be targeted for experimental validation. In general, the focus will be on nitride-based heterostructures, such as GaAlN quantum wells, to cover a wide emission wavelength range in the UV spectral range.
While in other nitride-based heterostructures, such as InGaN quantum wells, the electronic and optical properties of these systems are significantly affected by carrier localization effects originating from alloy fluctuations, far less attention has been dedicated to these effects in GaAlN systems. These factors have to be investigated and included in a realistic treatment of the GaAlN structures, ideally on a microscopic, atomistic level. Combining first-principles, empirical atomistic and continuum-based calculations, the project targets a detailed understanding of how carrier localization effects and thus connected deviations from the usually assumed ideal structures impact radiative and potentially non-radiative recombination processes in nitride-based UV emitters.
The project aims for a close linkage between theory and experiment, to elucidate how to manage radiative and non-radiative recombination effects in photonic materials and devices in general.
Key Responsibilities
This project builds on first-principles, empirical atomistic and continuum-based investigations we have undertaken of nitride-based nanostructures, including strain and alloy effects. Here, development of atomistic and continuum-based simulation tools, including parameter and code development, is required to address the role of radiative and non-radiative recombination processes in III-N heterostructures operating in the UV spectral range. Interaction with both internal and external partners from theory and experiment will be a central part of the project.
Essential Criteria
The successful candidate for the positions will have a very good undergraduate degree in physics, electrical engineering, applied mathematics, chemistry or materials science.
Informal enquiries concerning this studentship can be made to: Dr. Stefan Schulz (email [email protected]).
More details, also on the application process, can be found here:
https://www.tyndall.ie/pmo-16-ipic-phd-studentships-monolithic-and-heterogeneous-integration-theme