University of Cambridge

Job Opportunities


PhD position in Ultra-rapid Spin-state Interconversion: a new direction for Organic LEDs

Applications are invited for a PhD studentship to join the group of Dr Dan Credgington in the Cavendish Laboratory (Department of Physics), University of Cambridge, UK.

The studentship would commence in October 2018. The award will provide a tax-free stipend that will cover tuition fees (at the UK/EU rate) and living expense (at the RCUK rate, £14,553 per year for 2017/18). The University has a responsibility to ensure that all employees are eligible to live and work in the UK.

Fixed-term: The funds for this post are available for 3 years in the first instance.

The successful candidate should have a good first degree, and should expect to attain a Masters degree in Physics, Chemistry, Materials Science, or a related area.

This Royal Society funded studentship is focussed on solving one of the most fundamental and technologically important challenges in the organic light-emitting diode (OLED) field ¿ the generation of blue light. OLEDs operate by injecting electrons and holes into emissive organic molecules, where they form bound pairs termed "excitons". These excitons are either spin-0 (singlets) or spin-1 (triplets), and the radiative recombination of triplets is spin-forbidden, so they cannot emit light.

The core of this project is to explore the underlying fundamental physics of rapid spin interconversion in a new class of molecular semiconductor, while harnessing this understanding to enable a new generation of optoelectronic devices for which triplet states are not "dead ends". Intersystem crossing (ISC) rates between singlets and triplets will be measured using ultrafast (fs-ms) transient absorption (TA) spectroscopy, and linked to quantum-chemical calculations undertaken in collaboration. The key question to be answered is how to maximise the rate of ISC, and so inform the design of molecules or their environment specifically to achieve rapid ISC in devices.

The Optoelectronics Group is one of the world's leading academic groups in the field of organic and hybrid electronics. Its research programme is built on a broad scientific approach aiming to understand the electronic properties of solution processable semiconductors in general, but also aiming to understand in-depth the physical processes that govern the performance of organic and hybrid organic-inorganic electronic devices, such as light emitting diodes, photovoltaics, and field effect transistors. Further information can be found on the group's website:

If you are interested in the position, please contact Dr Dan Credgington ( by February 09, 2018 and make a formal application via University's Graduate Admissions website ( Further information on how to apply can be found at:

Deadline for submission of the application to the University is the 9th February 2018.

Please quote reference KA14448 on your application and in any correspondence about this vacancy.

The University values diversity and is committed to equality of opportunity.

The University has a responsibility to ensure that all employees are eligible to live and work in the UK.