Quantum dot superstructures


Contact Dr Kevin Critchley to discuss this project further informally

Project description

Wet chemical synthesis methods can produce semiconductors that consist of 100s to 10,000s of atoms – known as colloidal quantum dots. However, unlike the bulk semiconductors that we are familiar with in electronic devices, they are difficult to controllably dope with impurities.  Furthermore, the nature of the size of the crystal impurities (e.g. single point or clusters) and the position (e.g. centre or near the surface) will have an impact on the properties of these crystals.  We must understand the quantum effects in these crystals to advance their applications in electronic and optoelectronic devices. To produce electronic devices we will be forming assemblies of these quantum dots to form ‘super-crystals’. Super-crystals are analogous to atoms in a crystal, were the overlapping electron (hole) wave-functions form band-like structure.  With close packing the carrier mobilties of >10 cm2V-1s-1 can be obtained.  I propose to study novel construction methods for the doped quantum dot super-crystals and study their properties. By understanding the properties of the individual quantum dots and then subsequently how they behave as super-crystals, our vision is to develop methods that would enable low cost construction of flexible quantum dot electronic devices that could be used for field effect transistors (FETs), FET-biosensors, photovoltaics, and thermoelectrics.

Entry requirements

Applications are invited from candidates with, or expecting, a minimum of a UK upper second class honours degree (2:1) in a relevant discipline, a Master's degree in a relevant discipline, or both.

Additional staff contact

Steve Evans, Andy Brown

How to apply

If English is not your first language, you must provide evidence that you meet the University’s minimum English Language requirements.

Formal applications for research degree study should be made online through the university's website. Please state clearly in the research information section that the PhD you wish to be considered for is 'Quantum dot superstructures' as well as Dr Kevin Critchley as your proposed supervisor.

We welcome scholarship applications from all suitably-qualified candidates, but UK black and minority ethnic (BME) researchers are currently under-represented in our Postgraduate Research community, and we would therefore particularly encourage applications from UK BME candidates.  All scholarships will be awarded on the basis of merit.

If you require any further information please contact the Graduate School Office
e: physics.pg.admissions@leeds.ac.uk