Nano Letters · 2006 · 548 citations · 26 references
EngineeringElectrical EngineeringMaterials ScienceOptoelectronicsSemiconductor DevicesSemiconductor MaterialsLight-emitting DiodesLuminescent MaterialsOptoelectronic MaterialsOrganic SemiconductorsQuantum DotsSemiconductor NanomaterialsColloidal Quantum DotsColloidal Semiconductor NanocrystalsExternal Quantum EfficiencyHole Transport LayersNanocrystalsQuantum Dot Light-emitting DiodesQuantum EfficiencySemiconductor Quantum Dots
We report multilayer nanocrystal quantum dot light-emitting diodes (QD-LEDs) fabricated by spin-coating a monolayer of colloidal CdSe/CdS nanocrystals on top of thermally polymerized solvent-resistant hole-transport layers (HTLs). We obtain high-quality QD layers of controlled thickness (down to submonolayer) simply by spin-coating QD solutions directly onto the HTL. The resulting QD-LEDs exhibit narrow ( approximately 30 nm, fwhm) electroluminescence from the QDs with virtually no emission from the organic matrix at any voltage. Using multiple spin-on HTLs improves the external quantum efficiency of the QD-LEDs to approximately 0.8% at a brightness of 100 cd/m(2) (with a maximum brightness over 1,000 cd/m(2)). We conclude that QD-LEDs could be made more efficient by further optimization of the organic semiconductors.
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Hybrid Nanorod-Polymer Solar Cells
Wendy U. Huynh, Janke J. Dittmer, A. Paul Alivisatos · Science · 2002 · 5K citations
Electroluminescence from CdSe quantum-dot/polymer composites
B. O. Dabbousi, Moungi G. Bawendi, O. Onitsuka et al. · Applied Physics Letters · 1995 · 989 citations