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Advanced materials (Deerfield Beach, Fla.)

Passivation Using Molecular Halides Increases Quantum Dot Solar Cell Performance.


PMID 26576685

Abstract

A solution-based passivation scheme is developed featuring the use of molecular iodine and PbS colloidal quantum dots (CQDs). The improved passivation translates into a longer carrier diffusion length in the solid film. This allows thicker solar-cell devices to be built while preserving efficient charge collection, leading to a certified power conversion efficiency of 9.9%, which is a new record in CQD solar cells.