2 research outputs found
Size and Energy Level Tuning of Quantum Dot Solids via a Hybrid Ligand Complex
The performance of quantum dots (QDs)
in optoelectronic devices
suffers as a result of sub-bandgap states induced by the large fraction
of atoms on the surface of QDs. Recent progress in passivating these
surface states with thiol ligands and halide ions has led to competitive
efficiencies. Here, we apply a hybrid ligand mixture to passivate
PbSe QD sub-bandgap tail states via a low-temperature, solid-state
ligand exchange. We show that this ligand mixture allows tuning of
the energy levels and the physical QD size in the solid state during
film formation. We hereby present a novel, postsynthetic path to tune
the properties of QD films