People

Current Members

Dr. Jean Charles Ribierre

Jean Charles has been appointed as a reader at the School of Physics and Astronomy of the University of St Andrews in January 2023. He obtained his PhD in 2002 from the University of Strasbourg in France, conducting research on the physics of photorefractive polymers under the supervision of Dr Alain Fort. After postdoctoral research experiences in organic optoelectronics at RIKEN in Japan and at the University of St Andrews, he joined as an assistant professor the department of Physics of Ewha Womans University in South Korea between 2010 and 2013. He was then appointed as an associate professor in the Center for Organic Photonics and Electronics Research (OPERA) of Prof Chihaya Adachi at Kyushu University, focusing his research activities on the development of high-efficiency near-infrared TADF OLEDs and the realization of current injection organic laser diodes. He also has a strong experience in the translation of new technology with the creation of a startup company in Japan, KOALA Tech, of which he was the CEO between 2019 and 2022. His main research interests focus on the development and physics of organic electronic materials and devices.

Email: jr43(at)st-andrews.ac.uk

Office: 205

Phone: +44 (0) 1334 463184

https://orcid.org/my-orcid?orcid=0000-0001-7288-3795

Dr. Junyi Gong

BSc & MSc – Fudan University

PhD – University of St Andrews

Junyi is from Shanghai, China and graduated from University of St Andrews in 2023 with a PhD in physics (Supervised by Prof. Ifor Samuel and Prof. Graham Turnbull). Junyi joined our group in January 2025 as a research fellow to work on the project ‘Effects of sub-wavelength photonic nanostructures on thermally activated delayed fluorescence’. His research mainly focuses on organic optoelectronic devices and underlying device and material physics.

Email: jg259(at)st-andrews.ac.uk

Dr. Abhishek Gupta

BSc – Janta College

MSc & MTech – Aligarh Muslim University

PhD – Indian Institute of Technology Mandi

Abhishek is from the 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 an M.Tech in nanotechnology at AMU. During his M.Tech, he worked on nano-sized, semiconducting TiO2 powder at ARCI Hyderabad. After M.Tech, he worked on device fabrication for photovoltaic cells at the 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 the University of St. Andrews as a Newton International Fellow, where he is working on highly efficient red TADF emitters for photodynamic therapy (PDT).

Email: akg5(at)st-andrews.ac.uk

Saban Tosun

BSc – Hacettepe University

MSc – University of Bordeaux

MEng – Technical University of Darmstadt

Saban, originally from Türkiye, joined our group in September 2023 with a strong enthusiasm for technology and material science. His Ph.D. research focuses on exploring ‘The effects of sub-wavelength photonic nanostructures on thermally activated delayed fluorescence’. By exploring the interplay between advanced nanostructures and TADF mechanisms, Saban aims to contribute to the development of innovative solutions for OLED technologies.

Email: st293(at)st-andrews.ac.uk

Masato Kato

BEng – University of Tsukuba

MEng – University of Tsukuba

MEng – Grenoble Alpes University

Masato is from Tsukuba, near Tokyo, Japan, and he joined our group in September 2025. He obtained a Bachelor’s degree in Engineering from the University of Tsukuba, Japan, and then pursued a double Master’s degree in Engineering at Grenoble Alpes University in France and the University of Tsukuba. During his Master’s studies, he worked on developing “Organic Droplet Lasers” for laser display applications. Outside of academia, Masato enjoys fishing, diving, and cooking Japanese dishes such as sushi and ramen. At St Andrews, his PhD research focuses on “Organic Hyperbolic Metamaterials” for optoelectronic applications.

Email: mk425(at)st-andrews.ac.uk