High efficient self-assembly CdSe/ZnS quantum dots light-emitting devices in organic matrix

Abstract

We have fabricated and investigated the effect of CdSe/ZnS quantum dot (QD) concentrations on self-assembly hybrid organic/inorganic light emitting diodes (QD-OLEDs). The uniform distribution of QDs with controllable density was achieved using the conventional spin-coating method. There was a QD threshold concentration below which there was no emission from the QDs. The estimated QD concentration was around 9×1011 cm−2 for the best performance of QD-OLED. The QD emission was increased about three times by annealing of QDOLED.