Addressing the Operational Instability Challenges of Perovskite Solar Cells

Perovskite solar cells (PSCs) have reached 25.7% power conversion efficiency, but their long-term stability under operational conditions is far behind the standards required for technology commercialization. In this presentation, we summarize our recent progress at UCLA to address the stability of PSCs from the perspective of understanding how the surface/interface energetics, lattice strain, defects, and charge transport affect the degradation of PSCs. Particularly attention are on (1) surface passivation and the formation of ideal interface for the NIP structure; and (2) management of ion-migration.