Perovskite solar cells show great promise but their instability hinders commercialization. This research reports an industrial encapsulation process using a highly viscoelastic semi-solid/highly viscous liquid adhesive that reduces thermomechanical stress. Adding hexagonal boron nitride improves barrier and thermal properties. Encapsulated devices, without edge sealant, passed multifaceted accelerated aging tests, retaining >80% initial efficiency. The encapsulation method is applicable to various cell configurations and extends to semi-transparent cells.

Paolo Mariani, Miguel Ángel Molina-García, Jessica Barichello, Marilena Isabella Zappia, Erica Magliano, Luigi Angelo Castriotta, Luca Gabatel, Sanjay Balkrishna Thorat, Antonio Esaú Del Rio Castillo, Filippo Drago, Enrico Leonardis, Sara Pescetelli, Luigi Vesce, Francesco Di Giacomo, Fabio Matteocci, Antonio Agresti, Nicole De Giorgi, Sebastiano Bellani, Aldo Di Carlo, Francesco Bonaccorso