6533b7defe1ef96bd1275f1d
RESEARCH PRODUCT
Quantum dot-block copolymer hybrids with improved properties and their application to quantum dot light-emitting devices.
Changhee LeeWan Ki BaeJeonghun KwakKookheon CharRudolf ZentelHyemin LeeMatthias Zornsubject
Materials scienceMacromolecular SubstancesPolymersSurface PropertiesMolecular ConformationGeneral Physics and AstronomyNanotechnologyColloidMaterials TestingQuantum DotsCopolymerNanotechnologyGeneral Materials ScienceSolubilityLightingchemistry.chemical_classificationtechnology industry and agricultureGeneral EngineeringPolymerEquipment Designequipment and suppliesGraftingEquipment Failure AnalysischemistryQuantum dotQuantum efficiencyHybrid materialCrystallizationdescription
To combine the optical properties of CdSe@ZnS quantum dots (QDs) with the electrical properties of semiconducting polymers, we prepared QD/polymer hybrids by grafting a block copolymer (BCP) containing thiol-anchoring moieties (poly(para-methyl triphenylamine-b-cysteamine acrylamide)) onto the surfaces of QDs through the ligand exchange procedure. The prepared QD/polymer hybrids possess improved processability such as enhanced solubility in various organic solvents as well as the film formation properties along with the improved colloidal stability derived from the grafted polymer shells. We also demonstrated light-emitting diodes based on QD/polymer hybrids, exhibiting the improved device performance (i.e., 3-fold increase in the external quantum efficiency) compared with the devices prepared by pristine (unmodified) QDs.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-10-23 | ACS nano |