Luminescence from single colloidal nanocrystals embedded in organic light emitting devices

Publication Type:



APS Meeting Abstracts, (2007)


2007, 2013 and earlier


The photophysical properties of individual CdSe/ZnS (core/shell) nanocrystals embedded in the active layers of electrically driven organic
light emitting devices (OLEDs) were investigated at room temperature.
Emission from the same nanocrystals was recorded under laser illumination
and when the OLED was driven electrically. For both types of excitation we
observed blinking and spectral diffusion, key signatures of single quantum
dot fluorescence. Enhanced electroluminescence from the organics at the
sites of nanocrystals suggests the formation of current channels through
the quantum dots. This hypothesis is supported by atomic force microscopy
studies of the organic layers.