Energy transfer in hybrid systems composed of TPD and CdSe/CdS/ZnS colloidal nanocrystals

We studied the efficiency of energy transfer in systems composed of TPD organic semiconductor and CdSe/CdS/ZnS nanocrystals passivated with different organic ligands. It was demonstrated that increasing the thickness of the nanocrystal capping layer results in reduction of energy transfer rates from TPD to the nanocrystals as well as inter-nanocrystal energy transfer rates. The Förster mechanism was suggested to be responsible for the energy transfer observed.