Department of Chemical Engineering & Biotechnology: StranksLab 22nd March 2025
At this year’s Cambridge Festival in the department (CEB), we had the pleasure of running our ever-popular hands-on activity exploring renewable energy through dye-sensitised solar cells. Using blackberry juice as a natural dye, participants of all ages were able to build their own Grätzel cells.
It was fascinating to watch the young scientists troubleshoot their setups, tweaking connections and fine-tuning their cells. The winning cell, built by Archie, produced an impressive 340 mV, the highest output of the day.
While the activity was a playful introduction to solar technology, it also offered a glimpse into the kind of work happening in our labs today. At CEB, we’re exploring next-generation photovoltaics, including lead halide perovskite solar cells – which could be up to two-thirds more efficient than conventional panels. Seeing the next generation so engaged with renewable energy by experimenting, problem-solving and celebrating their results was a reminder of why this work matters. With fresh ideas and growing curiosity, these young scientists could be the ones to transform the future of sustainable energy, it is great to be a part of supporting that.
Big cheers for Archie – winner of our Solar Berries Leaderboard! Archie's blackberry-powered solar cell produced 342 mV, an impressive kick of power from a piece of fruit. It was so impressive to see such enthusiastic and curious participants across the whole day.
19 March - 4 April 2025
