Fig. 6: Stability issues at the interfaces.
From: Degradation pathways in perovskite solar cells and how to meet international standards

a Interfacial voids could be formed due to the slow release of residual DMSO. Adapted with the permission from ref. 93 Copyright © 2021, The American Association for the Advancement of Science b I-SAM increased the toughness of perovskite/SnO2 interface and suppressed the deterioration of the interface under long-term operating. Adapted with the permission from ref. 94 Copyright © 2021, The American Association for the Advancement of Science.