Light People: Prof. Henry Snaith's (FRS) perovskite optoelectronics journey.

In 2012, Prof. Henry Snaith demonstrated the first solid-state perovskite solar cell (PSC) with an efficiency of 10.9%, igniting a surge of interest and research into perovskite materials for their potential to revolutionize the photovoltaic (PV) industry. Over the past two decades, perovskite optoelectronics have made remarkable progress, with significant improvements in efficiency, stability, and commercial viability, which has transformed these materials from a scientific curiosity into a leading platform for a wide range of applications, particularly in PVs and light-emitting diodes (LEDs). Prof. Henry Snaith's election as a Fellow of the Royal Society (FRS) credits to his groundbreaking discovery of the use of perovskites in efficient solar cells. In addition to his academic role, Henry co-founded and served as the Chief Scientific Officer (CSO) of two spin-off companies, Oxford PV Ltd. and Helio Display Materials Ltd., which focus on commercializing metal halide perovskite PVs and light-emitting applications, respectively. His team has led the global R&D community in advancing the fundamental understanding and practical use of perovskites since 2012. On 5th September 2024, Oxford PV announced the world's first commercial sale of next-generation perovskite tandem solar panels, which generate up to 20% more energy than a standard silicon panel. In an insightful conversation with Light: Science & Applications, Prof. Henry Snaith, a pioneer of metal halide perovskite optoelectronics, shared his story on how scientific curiosity, close observation to unexpected results, and serendipity led to the discovery of perovskite as a solid light absorber, as well as the key findings and breakthroughs to achieve the remarkable efficiency of PSCs. He highlighted the significant contribution of his team to the progress of PSC technology from its initial discovery to its current exciting commercialization status; this includes the development of tandem solar cells and the exploration of p-i-n configurations for better stability. Moreover, he expressed his views on the future of perovskite LEDs and environmental and safety concerns related to perovskite optoelectronics technology. The interviews further explored Henry's journey from an undergraduate physics student to a renowned scientist. His career success is undoubtedly driven by his ambition for immediate real-world impact and his relentless pursuit of more efficient, low-cost, and sustainable energy solutions to address global environmental challenges. When asked about the potential for a Nobel Prize, Henry acknowledged that PSC technology could be worthy of such recognition, given its scientific advancements and significant contributions to addressing the global challenge of climate change. Looking ahead, Henry has expressed an interest in contributing to public policy, particularly in the areas of renewable energy and education reform, with an emphasis on the creation of an inclusive education system that better supports neurodiversity.