Thiol-capped CdTe quantum dots hosted in saponites

Composite materials were easily prepared based on saponites where thiol-capped CdTe quantum dots (QDs) were hosted. A saponite was exchanged with a cationic polyelectrolyte solution of poly(diallyldimethylammonium chloride) (PDDA) and the thiol-capped QDs. Two composites based on delaminated saponites, a cationic polyelectrolyte and CdTe QDs were also prepared by spin-coating on a glass support. The presence of the QDs hosted in the inorganic matrices was tested by FT-IR and optical luminescence measurements. Additionally, a light-emitting diode was assembled and its I - V electrical characteristics are presented. Transition from ohmic behaviour to space charge limited conduction appeared at a turn-on voltage of 5.2 V. Facile synthesis of composite luminescent materials based on CdTe quantum dots hosted in saponites.