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 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 Kou Yoshida

Kou was born in Nagasaki, Japan. He has been committed to research in organic semiconductors since he was an undergraduate at Kyushu University, Japan. He conducted his bachelor, master and PhD studies there under the supervision of Prof. Chihaya Adachi and gained experience in the design and synthesis of organic materials as well as device fabrication and characterization. His PhD study is on device temperature rise of organic semiconductor devices during short voltage pulse application at high current density. After he obtained PhD in engineering, he joined the groups of Profs. Ifor Samuel and Graham Turnbull as a research fellow. He is currently studying organic light-emitting diodes for optical communication.

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 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 Alfonso Brenlla

Alfonso graduated in chemistry at the University of Santiago de Compostela in northwest Spain. He obtained a PhD at the same institution investigating photoinduced electron and proton transfer reactions in small organic molecules. In late 2010 he moved to Wayne State University in Detroit where he investigated DNA polymerases by single-molecule fluorescence. He joined the group in April 2016 and his current research project involves the characterization of conjugated polymers by single-molecule techniques.






Dr Saydulla Persheyev

Saydulla was born in Tashkent, Uzbekistan. In 1995 completed his PhD working on the joint research project between Ioffe Institute (St Petersburg, Russia) and Tashkent State University (Uzbekistan). In 1997 he joined “Amorphous materials group” at Dundee University working on various projects linked to PECVD deposition and excimer laser processing of amorphous hydrogenated silicon for various applications such as solar cells, bio-sensors, detectors, THz emission etc. From 2005 to 2009 worked for the spin out company based in Dundee “Quantum Filament Technologies” working on the development of thin film Field Emission Displays based on excimer laser crystallised amorphous silicon films. In 2014 he joined the School of Physics and Astronomy, St Andrews University. His current research interests are non-invasive medical devices for treatment and diagnostics, development of novel organic light emitting diode (OLED) based light sources for photodynamic therapy (PDT) to treat parasite based and fungal infection skin diseases, biophotonics and biosensors.

Dr Abhishek Gupta

Abhishek is from historical place Kalpi, 165 Km from Lucknow, India. He completed his B.Sc. in Chemistry and Industrial Chemistry from Janta College, Bakewar (U.P.) and M.Sc. in Industrial Chemistry from Aligarh Muslim University (AMU), Aligarh. He also completed M.Tech in Nanotechnology from AMU. During M.Tech he worked on nano-sized semiconducting TiO2 powder at ARCI Hyderabad. After M.Tech, he worked on device fabrication for photovoltaic cell at National Physical Laboratory, New Delhi. In 2017, he received his PhD on “Schiff base derivatives as Fluorescent Chemosensors, Solid State NIR Emitters and Catalysts” from IIT Mandi under the guidance of Dr. Pradeep C. Parameswaran. He joined University of St. Andrews as Newton International Fellow, where he is working on highly efficient red TADF emitters for photodynamic therapy (PDT).

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)




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.




Wenbo Li

Wenbo hold a BEng degree (on Display Technology) from East China University of Science and Technology, Shanghai, China. He also graduated with a BSc (Hons) degree from the physics department in University Strathclyde, Glasgow, UK in 2015. From 2015 to 2016, he stayed in Strathclyde and joined the group of Dr Aidan Arnold and Dr Paul Griffin as a MRes student for an attempt to make a 420nm blue magneto-optical trap utilizing diffraction gratings so as to gain colder thermal atoms. He started a PhD in Prof. Ifor Samuel’s group in September 2016. His research now mainly focusses on thermally assist delay fluorescence (TADF) emitters for organic light emitting diodes.




Iain Campbell

Iain holds an Mphys degree from the University of St Andrews, he interned with the group throughout his degree, working with Dr Gillanders and Professor Turnbull on explosives sensing. He has now joined the group and is working towards his PhD; His research is focused on sensing applications of organic semiconductors, particularly explosives and biomedical sensing.









Cheng Lian

Cheng is from Xiamen, China. He graduated with a BEng from Taiyuan University of Technology. Then he completed his MSc at Hong Kong Baptist University with a research project about developing large area organic light-emitting diodes for solid-state lighting. Cheng joined the group in October 2017 as a PhD student supervised by Prof. Ifor Samuel. His research mainly focuses on developing organic optoelectronics devices for medical applications.