Tailoring nanoscale interfaces for perovskite-perovskite-silicon triple-junction solar cells.

ABSTRACT: Triple-junction solar cells theoretically outperform their double-junction and single-junction counterparts in power conversion efficiency, yet practical perovskite-perovskite-silicon devices have fallen short of both theoretical limits and commercial targets. To address surface defects in the top perovskite junction, we introduce a piperazine-1,4-diium chloride treatment, which replaces less stable lithium fluoride. For interfacing the top and middle perovskite junctions, we optimize the size of gold nanoparticles deposited on atomic layer-deposited tin oxide for best ohmic contacting with minimal optical losses. Applying these strategies, our champion 1-cm² triple-junction cell achieved a third party-verified reverse-scan power conversion efficiency of 27.06% with an open circ

SUBMITTER: Zheng J 

PROVIDER: S-EPMC12623231 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature