Our latest publication on trap states in lead sulphide colloidal quantum dots has just been published online in Advanced Electronic Materials.toc figure

In this study, we collaborated with scientists of the Friedrich-Alexander University in Erlangen to probe photoinduced transitions in the low energy region of PbS colloidal quantum dots. Our data reveal the formation of two distinct absorption bands, which we assign to trap states on the surface of these nanosized crystals and we study the impact of crystal size and surface ligand on these trap states.

A proper understanding of these trap states and how to suppress them is of paramount importance for later applications in efficient electronic devices.