From Oxford & Cambridge to market: Transforming display technology

Learn about us
Founded by two world-renowned leaders in advanced materials science, Helio Display Materials holds early and fundamental intellectual property in Perovskite-based colour conversion technologies.
Based in Oxford, UK, Helio benefits from close proximity to world-class facilities such as Oxford University and Harwell, driving innovation in next-generation display technologies.
Our founders
Professor Henry Snaith FRS
Co-Founder, Board Director and Chief Scientific Officer
A Fellow of the Royal Society, Henry Snaith is professor at the University of Oxford’s Clarendon Laboratory, where he leads a research group in organic, hybrid and perovskite optoelectronic devices.

Supervised by Professor Sir Richard Friend, Henry gained his PhD at the University of Cambridge for research into organic photovoltaics. He then spent two years at the Ecole Polytechnique Federale de Lausanne as a post-doc, researching solid-state, “hybrid” solar cells. He took up his faculty position in Oxford in 2007, where he has conceptualised and pioneered highly efficient photovoltaic and optoelectronic devices based on metal-halide perovskites.

In 2010, Henry founded Oxford Photovoltaics Ltd, which is now successfully commercialising perovskite solar technology and where he is Chief Scientific Officer. He co-founded Helio Display Materials Ltd., in 2016.

Henry has won numerous accolades and awards for his research and discoveries in the field of metal halide perovskite optoelectronics. In addition to being listed as Clarivate Citation Laureate, he has the Patterson Medal from the Institute of Physics, has been listed in Nature’s Ten People Who Mattered, gained the Materials Research Society’s Outstanding Young Investigator Award and the EU-40 Materials Prize from the European Research Society. In 2015, he earned second place as one of the World’s Most Influential Scientific Minds, in October 2017, was awarded the Institute of Physics James Joule Medal and Prize for the discovery and development of organic-inorganic metal-halide perovskite solar cells, and in 2018, he received the inaugural UK Blavatnik Award for Young Scientists.
Professor Sir Richard Friend
Co-Founder
World-renowned for research into physics and engineering of carbon-based semiconductors, and Cavendish Professor at the University of Cambridge, Sir Richard Friend pioneered the study of organic polymers and, more recently, the field of perovskites. His work has been applied to the development of polymer field effect transistors, light emitting diodes, photovoltaic diodes, optically pumped lasing and directly printed polymer transistors.

In 1992, Sir Richard co-founded Cambridge Display Technology Ltd (CDT) as a spin-out from the University of Cambridge, after discovering how to create organic electroluminescence from polymers (P-OLEDS). CDT was floated on NASDAQ in 2004 and was acquired by Sumitomo Chemical Company in September 2007.

Sir Richard was knighted for Services to Physics in 2003, is a Fellow of the Royal Society and of the Royal Academy of Engineering, plus Laureate of the Millennium Prize for Technology. He is also recognised for his work as a Foreign Member of the US National Academy of Engineering and as a winner of the Israel Institute of Technology Harvey Prize. In addition to numerous accolades and awards, he has produced in excess of 1000 publications and has registered over 60 patents.
Leadership team
Our leadership team combines world-class scientists who are pioneers in perovskite technology and prominent business leaders with proven track records in leading start-up companies and in commercialising display materials.
Dr. Bernard Wenger
Chief Technology Officer
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Bernard is an expert in perovskite materials and optoelectronic devices. In 2015, he joined Prof. Snaith’s group at Oxford University, recognized as a pioneering and world-leading team in this field. As a senior scientist in the group, he played a significant role in the acquisition and management of grant projects and supervision of graduate students, contributing to more than 30 scientific papers and patents. As a co-founder of HelioDisplay Materials, he has led the technical team since 2019.

Between 2009 and 2014, Bernard gained experience in private research at CSEM in Switzerland, where he became a senior R&D engineer. He played a significant role in the management and acquisition of industrial contract research and multi-disciplinary international projects, gaining significant expertise in optics, (bio)sensors and systems integration.

Bernard trained as a physical chemist and obtained a PhD degree from EPFL in Switzerland. He obtained an early-career fellowship to work with Prof. Friend at the University of Cambridge in the field of polymer optoelectronics.
Dr. Valérie Berryman-Bousquet
VP of Engineering
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Valérie has over 20 years’ experience in the research and development of light emitting devices for Sharp Corporation - a global leader in liquid crystal displays and consumer electronics.  At Sharp Laboratories of Europe she led multidisciplinary R&D teams delivering new LED and laser device technologies for applications in lighting and displays. As senior R&D manager, Valérie worked extensively with Sharp’s Gallium Nitride LED production team on device modelling, fabrication and characterization.

Most recently, Valérie and her team developed new quantum dot LEDs for emissive displays using solution processing.Valérie has a PhD in Physics from the University of Nice Sophia Antipolis. She has gained a fellowship of Institute of Physics (IOP) and has been keen to share her career experience as a speaker at IOP events.
Dr. Nobuya Sakai
Principal Chemist
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As a principal material chemist, Nobuya has played a significant role in R&D in Helio Display Materials since 2019. He is an expert in material science, especially metal halide perovskites. As a postdoctoral research assistant, he joined Prof. Snaith’s group at Oxford University in 2014, contributing to more than 50 scientific papers and patents on perovskite materials for optoelectronic device applications.

Nobuya was awarded a PhD in Prof. Miyasaka’s group at Toin University of Yokohama. He was a JSPS Research Fellowship (DC2) in the field of surface modification of metal oxide for dye-sensitized solar cells from 2012-2013.
Dr. Kate Ronayne
Investor Director (BGF)
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Kate has a PhD in Physical Chemistry from The Queen’s University Belfast and started her career working as a Laser Instrument Scientist at the Science and Technology Facilities Council’s Rutherford Appleton Laboratory. In 2008 she moved into the technology transfer team, developing new spin-out opportunities from the Council’s IP portfolio and working closely with the portfolio companies.

Kate progressed through a number of management roles at STFC, most recently as Executive Director of Business and Innovation where she was responsible for all of STFC’s interactions with industry through technology transfer, partnerships and the development of the Harwell and Sci-Tech Daresbury Campuses.

Kate focuses predominantly on physical sciences opportunities.
David Denny
Investor Director (Longwall)
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David founded Longwall with Matthew and Michael. They raised their first fund, OTECF, in 2008.

David started his career as a graduate engineer in Carnaud Metalbox (now Crown Cork), working in a range of roles from R&D to production and project management.

David spent much of his career living and working overseas in Spain, Argentina, Belgium and France. David did his MBA at Harvard Business School, after which he joined Z Corporation, an MIT licensee start up. He spent several years growing the European and Asian businesses before entering the venture industry.

David predominantly focuses on physical science and engineering opportunities.
David Hayes
Investor Director, Exec Chair (Haylo)
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David Hayes, a Founding Partner at Haylo Ventures, has a strong track record of innovation and entrepreneurship in the tech industry.

Previously, David was CEO of Wave Optics, which he led through its sale to Snap inc. in May 2021 - the UK's largest deep tech transaction ever.

David has also held executive positions at DAQRI Labs (Executive Vice President, overseeing all aspects of hardware) and 1066 Labs (CEO, leading to the company's acquisition by DAQRI in 2016).

David's entrepreneurial journey includes founding and leading several other successful tech companies, including Velocity Mobile, A Living Picture, and DAT Group plc.
Yaocheng (Jason) Liu
Investor Director (Goertek)
Chief Technology Officer and Senior Vice President of Investment at Goertek, Founding Partner of Resonance Venture Capital. Before joining Goertek, Jason worked as a researcher at IBM Semiconductor R&D Center, a consultant at McKinsey & Company, VP of Marketing at Yingli Solar, and Managing Director at CGP Tech Fund.

He holds a bachelor’s degree in Materials Science and Engineering from Tsinghua University, a master’s degree in Electrical Engineering and a Ph.D. degree in Materials Science and Engineering from Stanford University.

The 20+ years of working experience across multiple domains provided him with profound insights and a forward thinking approach on technology development, marketing, strategic planning, and investment in high tech industry.
Explore exciting career opportunities at Helio and become a part of our innovative team
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Our investors
Our investors include leading venture capitalists Haylo Ventures, Goertek, Longwall Ventures, BGF and IP Capital who each bring a wealth of experience in supporting start-up technology companies. They were attracted by our:
  • Excellent prospects of being first to market with the next generation of display materials technology 
  • Promise to bring superior efficiency and lower costs to the industry through metal halide perovskites
  • Fundamental IP in light emitting applications of perovskites exclusively licensed from Oxford and Cambridge universities
  • Rapid speed of progress
  • Close relationship with the founders, their active involvement assuring that our developments are based on the world leading science base in perovskites
GOERTEK (HONG KONG) CO., LTD
are a leading OEM/manufacturer, enabling expanded manufacturing and supply routes across Asia.
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