<p>➀ Fraunhofer FEP's Design-PV project developed decorative films using roll-to-roll nanoimprint lithography, enabling solar modules to blend seamlessly into building facades while retaining up to 80% efficiency of traditional modules.</p><p>➁ Key challenges included improving adhesion of films on ETFE substrates, addressed via a plasma process to enhance surface roughness for reliable bonding.</p><p>➂ Future steps include testing additional designs, assessing long-term durability, and presenting the technology at Radtech Europe Conference 2025.</p>