As Europe’s construction sector advances towards climate neutrality, the need for efficient, sustainable solar energy solutions integrated directly into building materials becomes more urgent than ever. Perovskite solar cells (PSCs), which are lightweight, highly efficient, and cost-effective, offer considerable promise for future building-integrated photovoltaics (BIPV). However, challenges such as complex material behaviour, instability during testing, and the use of hazardous solvents have slowed industrial adoption.

In a significant breakthrough, researchers from Swansea University and Delft University of Technology, working within the framework of the APOLLO project, have developed a novel hybrid characterisation methodology that combines time-resolved microwave photoconductivity with time-resolved photoluminescence. This technique enables quicker, more reliable measurement of key parameters such as carrier mobility and trap density, without damaging sensitive perovskite materials.

Importantly, this innovation also supports the utilisation of environmentally friendlier solvent systems, such as DMPU, ethanol, and dimethyl carbonate. Although devices using these greener alternatives currently demonstrate slightly lower efficiencies, the study shows they have comparable long-term performance potential. With further optimisation, they could replace more harmful options like DMF and DMSO, advancing the EU's objectives for safer and greener industrial practices.

By combining scientific excellence with practical, scalable application, this work contributes directly to ECTP’s strategic vision: enabling safer, faster, and more sustainable construction innovations that support energy-positive buildings.

If you want to learn more, read the full article and visit the APOLLO project’s website.