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PhD project: energy saving LEDs based on branched nanowires

Epitaxial growth and characterization of energy-saving LEDs based on branched nanowires
The main idea of this project is to exploit the advantages of III-V semiconductor nanowires to pursue novel charge diffusion induced LEDs with high emission efficiency as a game changer in the traditional design of LEDs.

Branched nanowires. SEM-Photo: Vilgaile Dagyte 2018

Introduction

The research at the division of Solid State Physics focuses around different aspects of semiconductor physics, ranging from materials science to quantum physics, to different applications. The division also leads NanoLund, the major interdisciplinary research environment within nanoscience and nanotechnology at Lund University. Lund Nano Lab is a central key facility for fabrication of material and devices on the nanoscale. The division is also heavily involved in the undergraduate education, especially within the “Engineering Nanoscience” program.

Since almost ten years, our research within the area of one-dimensional semiconductor structures, so called nanowires, has been at the international forefront. So far, our three main areas have been: epitaxial growth of nanowires, fundamental properties studied with transport physics and optical physics, and more applied nanoelectronics.

Lund Nano Lab is well equipped with several epitaxy machines and processing tools as well as characterization equipment, all in a clean room environment. In addition, we have access to advanced characterization equipment outside Lund Nano Lab, such as local access to electro-optical characterization, and measurements of internal and external quantum efficiency as well as low temperature photoluminescence characterization and electrical characterization, and more, to determine materials properties. The close collaboration within NanoLund provides access to transmission electron microscopy as well as MAXIV, which contributes to the advanced characterization of the material's crystal properties and deeper insights into parameters that affect them.

Lund NanoLab facilities

Project specification

Work duties

The aim of the project is to evaluate the potential of charge carrier diffusion-induced LEDs based on nanowires. The candidate will develop the growth and characterization of nanowires for LEDs based on charge carrier diffusion and also quantized heterostructures for fundamental electrical and optical measurements.
The work is mainly experimental and the doctoral student will contribute to the development of selective particle deposition and will work in a clean room environment, where metal organic gas phase epitaxy will be used for synthesis, and clean room tools will be used for processing and characterization. The PhD student is expected to work independently and in groups as well as in close collaboration with other research groups at the department and within NanoLund.

We have a large network of international cooperation partners and the PhD studies might include an exchange with another University or a secondment in in industry.              

The main duties of doctoral students are to devote themselves to their research studies which includes participating in research projects and third cycle courses. The work duties can also include teaching and other departmental duties (no more than 20%).

The doctoral student is expected to work independently, as well as in close collaboration with researchers carrying out other tasks within the project.

Desirable skills

We expect that your undergraduate studies include courses in solid state physics, materials science, thermodynamics and semiconductor processing. The research is to a large extent interdisciplinary, and a broad competence profile and experience from relevant areas of physics, chemistry and micro/nanoscience is of high value. The laboratory work skills are essential, specifically experience in clean-room work, semiconductor synthesis and characterisation. Important personal qualities are, beside creativity and a curious mind, the ability to work both independently and in a group and experience in the scientific interaction with researchers from other disciplines and in other countries.

Enrolment: Physics

Subject curriculum for physics at the Faculty of Engineering TEFAFF00 (pdf, 265kB, new window)

Supervisor

Magnus Borgström, Professor at Solid State Physics

Magnus Borgström's personal page including contact information

Division of Solid State Physics webpage

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