Complete Mapping of Interacting Charging States in Single Coupled Colloidal Quantum Dot Molecules.

ABSTRACT: Colloidal quantum dots (CQDs), major building blocks in modern optoelectronic devices, have so far been synthesized with only one emission center where the exciton resides. Recent development of coupled colloidal quantum dots molecules (CQDM), where two core-shell CQDs are fused to form two emission centers in close proximity, allows exploration of how charge carriers in one CQD affect the charge carriers in the other CQD. Cryogenic single particle spectroscopy reveals that while CQD monomers manifest a simple emission spectrum comprising a main emission peak with well-defined phonon sidebands, CQDMs exhibit a complex spectrum with multiple peaks that are not all spaced according to the known phonon frequencies. Based on complementary emission polarization and time-resolved analysis, this

SUBMITTER: Panfil YE 

PROVIDER: S-EPMC9047002 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature