In-situ entropic ligand engineering enables high-efficiency quantum dot solar cells.

ABSTRACT: Metal halide perovskite quantum dots (PQDs), particularly formamidinium lead triiodide (FAPbI₃) PQDs, have garnered significant attention for high-efficiency solar cells due to their ideal optical properties and stable phase structure. However, achieving desired colloidal dispersion and charge transport of FAPbI₃ PQDs still remains challenging. Herein, we report an efficient in-situ entropic ligand engineering strategy, using bis(2-ethylhexyl) phosphate (DEHP), to achieve improved dispersibility and charge transport in organic-inorganic hybrid FAPbI₃ PQDs. The branched 2-ethylhexyl tails of DEHP increase configurational entropy, improving solvent interaction and colloidal stability. In addition, the phosphinic acid head anchoring group of DEHP exhibits stro

SUBMITTER: Huang H 

PROVIDER: S-EPMC12819514 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature