Current Group members


Prof. Ifor Samuel

Ifor studied for both his MA and PhD in Physics at Cambridge where he developed his fascination with conjugated polymers. After finishing his PhD he moved to Paris and worked with France Telecom for two years, investigating the non linear optical properties of organic materials. Then he returned to Cambridge for a year, received a Royal Society University Research Fellowship and took up a position at the University of Durham until August 2000 when he moved to St Andrews. In 2001 he started the Organic Semiconductor Centre to encourage collaboration between physicists and chemists in developing the next generation of organic semiconductors and the wider field of organic electronics.



Prof Graham Turnbull

Graham is a Professor in the School of Physics and Astronomy at the University of St Andrews. He was born in Edinburgh, and brought up in the Scottish Borders. He graduated with a first-class M.Sci. degree in physics in 1995 and a Ph.D. in 1999, both from the University of St Andrews. His doctoral research project on nonlinear optics was supported by a Carnegie Trust Scholarship. Graham's work on organic semiconductors began as a postdoc at the University of Durham. From 2002 to 2007 he held an EPSRC Advanced Research Fellowship for research into advanced solid-state polymer laser systems. His current research interests focus on optical applications of soft materials, including organic semiconductor photonics, chemical sensing, nanoimprint lithography, nonlinear optics and optofluidics. Click here for Graham's web page.

Dr Arvydas Ruseckas

Arvydas graduated in Physics from Vilnius University in Lithuania in 1985 and received his PhD in chemical dynamics and physics jointly from the Lund University (Sweden) and the Institute of Physics (Vilnius) in 1999. He joined the team at the University of St Andrews in February 2001. His current research involves studies of photophysics and light amplification in conducting polymers, molecular solids and model organic molecules using ultrashort light pulses and ultrafast spectroscopy.








Dr Dimali Vithanage

Dimali graduated with a BEng (Hons) in Electronics and Communications Engineering from the University of Bath in 2003. The following year she went on to receive a MSc distinction in Photonics and Optoelectronic Devices jointly from the Universities of St Andrews and Heriot Watt. In September 2004 she joined the Polymer Optoelectronics group to start a PhD under the supervision of Prof Ifor Samuel. Her research was on parametric and polymer amplifiers using ultrafast spectroscopy. In 2008 Dimali joined the Laboratory of Ultrafast Spectroscopy at the Ecole Polytechnique Federale de Lausanne (EPFL) under Prof Majed Chergui in Switzerland. At EPFL, she was part of a team to build a MHz detection, X-ray absorption pump probe set up at the Swiss Light Source synchotron at the Paul Scherrer Institute. In 2009 she started as a postdoctral fellow at Lund University in Sweden, under Prof Villy Sundstrom on investigating the dynamics of solar cell materials using time resolved techniques. In late 2012 she came back to work for Prof. Ifor Samuel here in St Andrews to work on photophysics of organic semiconductors.

Dr Tariq Sajjad

M. Tariq Sajjad was born in Kot Addu (Southern Punjab) in Pakistan. He received his M.Sc in Electronics from Quaid-i-Azam University, Islamabad, Pakistan. Then he moved to the UK where he obtained his M.Sc in Nanotechnology and nanoelectronic devices and his PhD, both from the Advanced Technology Institute at the University of Surrey. His PhD was focussed on Exciton Dynamics in carbon nanotubes, where he studied exciton diffusion and exciton-exciton annihilation in carbon nanotubes. In October 2012 Tariq joined the group as a research fellow and currently working on photophysics of organic semiconductors. Tariq also a coordinates of the Organic Semiconductutor centre and is a project manager of AFMRC

, a facility that provides state of the art capability in analysis and control of functional materials at the nanoscale.



Dr Pavlos Manousiadis

Pavlos was born in Chernogorks, Russia. After completing his undergraduate studies in physics at University of Athens in 2005, he continued his studies and obtained M.Sc. degrees in I.T. and solid-state physics from the same university. His Ph.D. research was conducted in National Centre for Scientific Research "Demokritos", in the area of silicon nanocrystals and their application in photovoltaics. In April of 2013, he joined the group as a research fellow and currently is working in the field of optical communications.





Dr Ross Gillanders

Ross was awarded a BSc(Hons) in Instrumentation with Applied Physics from Glasgow Caledonian University in 2001, and completed his PhD in Physical Chemistry with a thesis titled “Optically-Addressed Thin Film Sensors” in 2004 at Strathclyde University, Glasgow. His first postdoctoral position was at the ICMCB at the University of Bordeaux developing spectroscopic instrumentation for supercritical fluid processes, before moving to the Optical Sensors Laboratory in Dublin City University in late 2005 to work on an optical oxygen sensor for marine and estuarine applications. He subsequently worked in University College Cork developing novel polymeric optical oxygen sensors for food packaging. Prior to taking the role at St Andrews in October 2013, Ross worked for three years at Cork Institute of Technology, mainly developing instrumentation for industry-led water-related projects.

Dr Alex Thompson

Alex Thompson was awarded a BEng (Electronics and Computer Systems)/BSc (Research and Development) from Swinburne University of Technology, Melbourne, Australia in 2010. He remained at Swinburne to perform a PhD in Biomedial Engineering with Prof. Paul Stoddart. His PhD project investigated novel optical techniques to stimulate neurons in the cochlea, with the aim of replacing conventional electrical stimulation. In December 2014 he joined the group to develop a wearable sensor of erythema in collaboration with the Photobiology Unit at Ninewells Hospital, Dundee.




Dr Caroline Murawski

Caroline studied physics at the University of Technology in Dresden, Germany. She received a diploma degree in 2010 for her work on white organic light-emitting diodes with high colour quality under supervision of Prof. Karl Leo. Staying for a PhD in Dresden, she investigated emitter orientation and examined exciton annihilation processes which cause efficiency roll-off. Caroline joined the groups of Prof. Ifor Samuel and Prof. Malte Gather as a Research Fellow in May 2015. Her current research includes exciton diffusion length analyses in small-molecule organic semiconductors and the application of OLEDs in biophotonics.



Dr Lethy Jagadamma

Lethy Krishnan Jagadamma received her PhD in Physics from University of Strathlcyde, Glasgow. In 2012 she moved to KAUST, KSA to join Prof Amassian’s group as a postdoctoral fellow. Her research was mainly focussed on the development of solution processed interlayers for efficient organic optoelectronic devices. She joined the Organic Semiconductor group at St-Andrews as Research Fellow in September 2015. Her research interests are mainly solution processed and vacuum evaporated metal oxides for optoelectronic devices such as organic, QD, perovskite solar cells, and light emitting diodes.


Dr Thomas Roland

Thomas received his BEng in 2009 at the Strasbourg National Superior School of Physics, France. During the last year internship, he worked in Stefan Haacke research group "biodyn" (CNRS, IPCMS). He continued in the group, recieving a Masters (nanophotonics), and PhD (entitled "ultrafast spectroscopy of new organic molecules for photovoltaic applications") in 2014. Since graduating, Thomas has performed post-doctoral research on up/down conversion, and a brief stop in Sweden (working on a SLM). He joined St Andrews as a Research Fellow in August 2015.





Dr Euan Shaw

Euan was born in Dumfries in the south west of Scotland. He obtained his MPhys degree in physics in 2011 from the University of St Andrews and carried on under the supervision of Dr Carlos Penedo to obtain his PhD in the field of single-molecule biophysics from the same university. He joined the Organic Semiconductor Centre upon the completion of his PhD in September 2015 as a Research Fellow to begin working on developing direct methods to measure exciton diffusion.








Dr Sai Rajendran

Dr. Sai Kiran Rajendran is a Research Staff at the School of Physics and Astronomy, University of St Andrews, working on the EPSRC Project Hybrid Polaritonics since November 2015. His current interests involve fabrication and engineering organic materials towards achieving strong coupling in planar microcavities and understanding their properties using ultrafast spectroscopic studies. Earlier he graduated in Physics from Sri Sathya Sai Institute of Higher Learning, Anantapur, India and worked on decorated carbon nanotubes; and non-linear optical studies on copper oxide nanorods. He then joined as an early stage researcher at the Dipartimento di Fisica, Politecnico di Milano, Milan, Italy as part of the Marie Curie Project ICARUS to study strongly coupled organic materials in microcavites using ultrafast spectroscopy techniques and obtained a Ph.D. degree thereafter.

Dr Arunandan Kumar

Arunandan received his M.Sc. in Physics from Indian Institute of Technology (IIT) Delhi in 2007. Thereafter, he started working at National Physical Laboratory (NPL), New Delhi in the field of organic electronics toward his doctoral thesis work. He received his PhD degree from IIT Delhi in Oct 2013 in a joint project between NPL and IIT on efficiency enhancement of organic light emitting diodes. Prior to joining University of St. Andrews, he worked as a postdoctoral fellow at CNRS-Université de Bourgogne-Franche Comté, France from Dec 2012 to May 2015. In France, his work was on designing and developing plasmonic cavities for quantum dot emission control. In the postdoctoral project, he also designed and developed a confocal microscope for imaging in focal and back focal plane, time resolved and autocorrelation function measurement. At the University of St Andrews, he is involved in the project on physics of organic polaritons. His areas of interest include organic electronics, single molecule fluorescence, nano-photonics, plasmonics and light-matter ineteraction.


Daesan Lim

Daesan was born in Pusan, in South Korea and after finishing BA in physics, graduated MSci in Semiconductor Optics and Physics from the Yonsei University, Seoul, Korea, and began his career at LG Philips LCD. He had experienced for the world first trial 32 inches LED hybrid LCD display project in 2004 and worked industry for 12 years in different companies LG and Philips as principal engineer. He also worked as research fellow in the Pukyung National University. In 2016, he joined the Organic Semiconductor Centre and is jointly supervised by Ifor Samuel and Eli Zysman-Colman. He presently works on electroluminescent devices using TADF emitters. Daesan can speak Chinese, Korean, Japanese. He has a wife and twin boys.



Guy Whitworth

Guy was born in London. He graduated with an MPhys in physics and astronomy from the University Southampton in 2012. For his Masters project Guy preformed studies in organic photovoltaic devices and their integration with nano-crystalline quantum dots. Guy joined the group in 2012 for his PhD and is investigating into the excited state interactions hindering organic optoelectronic devices in specific regard to organic solid-state lasers.




Stuart Thomson

Stuart was born in Ayrshire, Scotland and graduated with an MSci Chemistry & Physics from the University of St Andrews in 2013. In 2010 he undertook a summer project with the group on the measurement of charge transport in organic solar cell materials and in January 2013 continued this work for his Masters project. In September 2013 he re-joined the group for his PhD and is investigating organic solar cells using magnetic resonance techniques.




Yun Long

Yun was born in Jiangxi, in China and emigrated to England in 1994. She gained a BA and MSci in Physics from the University of Cambridge (Fitzwilliam College) in 2012, and went on to receive an MSc in Photonics and Optoelectronic Devices from the University of St Andrews (jointly with Heriot-Watt University). In the summer of 2011, she carried out a project with the Quantum Optoelectronics Group at Cambridge University investigating the cavity photon and exciton modes in semiconductor microcavities in order to characterise them for creation of exciton polaritons. Having joined the Organic Semiconductor Optoelectronics Group as a PhD student under the supervisor of Prof. Ifor Samuel in 2013, her research looks into exciton diffusion in organic semiconductors used in solar cells, focusing chiefly on methods used to measure the exciton diffusion length.

Jonathon Harwell

Jonathon is from Sussex, England and graduated with an MPhys in Physics from University St Andrews in 2014. In 2012 he worked with Dr Bansal and Dr Giardini on the fabrication of an optoelectronic muscle contraction sensor, with a view to use as an input device for prosthetic limbs. For his masters project he performed an investigation into the effects of strong coupling on organic light emitters in metal microcavities, with a focus on the effect on the energy of the light emitting singlet states. He started a PhD with Prof Ifor Samuel's group in September 2014, and is working on the fabrication of solar cells using perovskites - a promising new class of material - and on Monte Carlo simulations for modelling exciton diffusion in crystalline materials.

Francisco Tenopala Carmona

Francisco was born in Mexico City, Mexico. There he graduated with a BSc in Physics from the National Autonomous University of Mexico, in which he developed a final research project on Random Lasers. After that, he obtained the MSc degree in Materials Science and Engineering from the same university. In his masters project he worked in deposition and self-assembling techniques of gold thin films. He joined the Organic Semiconductor Optoelectronics group in September 2014 as a PhD student. Here he is working on single molecule spectroscopy of conjugated polymers under the co-supervision of Prof Ifor Samuel and Dr Carlos Penedo-Esteiro.




James Glackin

James is from Leigh, Lancashire and graduated from the University of Manchester with an MPhys degree in 2015. His masters project consisted of two smaller projects: building a solid state spectrometer for atmospheric measurements and modelling of random laser systems. James joined the group in September 2015 to start a PhD in explosive vapour sensors under the supervison of Prof. Graham Turnbull and Prof. Ifor Samuel.







Oskar Blaszczyk

Oskar graduated with a BSc in Physics from Imperial College London and an MSc in Medical Physics from University College London. In his Bachelors thesis he investigated the embodied energy of solar cells based on inorganic materials. In his Masters thesis he developed a theoretical model of the operation of an a-Se X-ray detector for a novel imagining method, coded aperture phase contrast X-ray imaging. In his PhD Oskar is looking at exciton diffusion with particular focus on how exciton transport can be controlled for optimising performance of optoelectronic devices and extending exciton diffusion length. Oskar enjoys sailing and martial arts.



Nidhi Sharma

Nidhi is from Dharamshala, Himachal Pradesh, a small state situated in the north of India. She completed her BSc (Hons) in chemistry from Panjab University Chandigarh, India and moved to Bangalore to undertake a masters degree at the Indian Institute of Science (IISc) Bangalore. Her masters project was to design synthesize and characterize materials which emit via thermally activated delayed fluorescence (TADF). Nidhi's passion for luminescent materials has brought her to St. Andrews to work on new TADF emitters and finally to fabricate Organic light emitting diode (OLED) using these emitters. (Co-supervised with Dr. Eli Zysman Colman, School of Chemistry)





Suqian Ma

Suqian was born in Henan, China and graduated with a BSc in Chemistry from Jilin University, China. In 2013, she joined the State Key Laboratory of Supramolecular Structure and Materials in the same university to start a PhD in organic fluorescence materials. She joined OSO in September 2016 as a joint PhD student under the sponsorship of China Scholarship Council. Now she is investigating into organic solid-state lasers of polymers and single crystals under the supervision of Prof. Ifor Samuel and Prof. Graham Turnbull.





Natalie Mica

Natalie was born in Austin , Texas. In 2016 she completed her BSc with Honors from the University of Texas at Austin with a research project about the dynamics of phase separation in lipid membranes. Later that year she joined the group to study the fabrication of organic and hybrid solar cells.





Mengjie Wei

Mengjie is from Anhui, China and graduated from Shanghai University in March 2016 with an MSc in Microelectronics. During the two and a half years, she worked on a national project about the multi-wavelength amplified spontaneous emission from different kinds of micro-structures. In September 2016, Mengjie was offered a place as PhD student under the supervision of Prof Ifor Samuel and was sponsored by China Scholarship Council. Currently her research focuses on organic semiconductor polariton light emitters, especially on the strong coupling and polariton lasing phenomena of organic materials in microcavities.