Chemically Anchored PbS-2PACz CQDs Inks for Scalable HTL in Narrow-Bandgap and All-Perovskite Tandem Solar Cells.

ABSTRACT: Mixed-metal narrow-bandgap (NBG) Sn-Pb perovskites are essential for achieving high-efficiency all-perovskite tandem solar cells (APTSCs). However, their single-junction performance is limited by interfacial recombination and inefficient charge extraction, due to non-uniform hole transport layers (HTLs). Here, PbS-2PACz colloidal quantum dots (CQDs) are synthesized, chemically anchoring [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz) onto PbS CQDs via solution-phase ligand exchange. The resulting PbS-2PACz CQD ink demonstrates excellent colloidal stability in weakly polar solvents and yields uniform, defect-suppressing films on perovskites. To further enhance the perovskite/HTL interface, an additional 2PACz treatment deepens the valence band (-5.60 eV), reduces trap density, and optimi

SUBMITTER: Hong SH 

PROVIDER: S-EPMC12632428 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature