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Cavendish Laboratory, Cambridge

Studying at Cambridge


Campbell Matthews

Campbell Matthews

PhD Candidate

Optoelectronics Group
Cavendish Laboratory
J J Thomson Avenue



I completed my undergraduate (BSc, BSc (hons) and MSc) at Victoria University of Wellington in New Zealand. My Masters research was completed under the Supervision of Dr Natalie Plank and focused on ZnO nanowire devices and their applications in biosensors and gas sensors.

I began my PhD in October 2018 under the supervision of Dr Dan Credgington, but am now under the supervision of Professor Neil Greenham.

Research Interests

My research focusses on the application of carbene-metal amides (CMAs) in organic light emitting diodes (OLEDs). CMAs are a new type of emitter which operate through thermally activated delayed fluorescence (TADF) and achieve near unity PLQE. It is hoped that TADF will allow for the development of new long lived OLEDs for display and lighting technologies. OLEDS based on CMAs have already been demonstrated with exceptionally high efficiency and brightness (>1000Cdm-2) as well as a emitting across a range of different colours. None the less, my work focusses on improving the operation of CMA OLEDs beyond initial demonstrations. Challenges still include driving emission into the deep blue and improving purity of colour. These goals must be achieved while maintaining good OLED performance. In addition I am particularly interested in the causes of degradation.  The lifetime of blue OLEDs is in particular, quite poor. Understanding the causes and mechanisms of degradation is key to developing more stable emitters.


I am a demonstrator for the Physics 1b laboratory component in the Michaelmas term 

Other Professional Activities

President of Cambridge University Australian and New Zealand Society

President of St John's College Beekeepers Society

Optoelectronics representative on the graduate consultative committee

Key Publications

Conaghan, Patrick J., Campbell SB Matthews, Florian Chotard, Saul TE Jones, Neil C. Greenham, Manfred Bochmann, Dan Credgington, and Alexander S. Romanov. "Highly efficient blue organic light-emitting diodes based on carbene-metal-amides." Nature communications 11, no. 1 (2020): 1-8. (