Dual functions of a new n-type conjugated dendrimer: Light-emitting material and additive for polymer electroluminescent devices

Jong Hyeok Park, Chulhee Kim, Young Chul Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We demonstrate a novel light-emitting diode (LED) of a graded bilayer structure that comprises poly(N-vinylcarbazole) (PVK) with good hole transport ability as the energy donor and a new distyrylanthracene-triazine-based dendrimer with enhanced electron transport ability as the light-emitting molecule. The device contains a graded bilayer structure of the PVK film covered with the dendrimer film prepared by sequential spin-casting of the dendrimer layer from a solvent that only swells the PVK layer. The bilayer device demonstrated a significantly enhanced electoluminescence quantum efficiency compared with the dendrimer single layer device or the PVK : dendrimer blend device with optimized composition. We also prepared composite LEDs with an MEH-PPV : emissive dendrimer blend. By doping the electron-deficient MEH-PPV layer with a small amount of the distyrylanthracene-triazine-based dendrimer, we could not only enhance the device performance but also depress the long-wavelength emission of MEH-PPV.

Original languageEnglish
Article number035101
JournalJournal of Physics D: Applied Physics
Volume42
Issue number3
DOIs
Publication statusPublished - 2009 Apr 8

Fingerprint

Dendrimers
Luminescent devices
dendrimers
Polymers
polymers
Triazines
Light emitting diodes
light emitting diodes
Quantum efficiency
quantum efficiency
Casting
electrons
Doping (additives)
Wavelength
Molecules
composite materials
Electrons
Composite materials
Chemical analysis
wavelengths

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

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abstract = "We demonstrate a novel light-emitting diode (LED) of a graded bilayer structure that comprises poly(N-vinylcarbazole) (PVK) with good hole transport ability as the energy donor and a new distyrylanthracene-triazine-based dendrimer with enhanced electron transport ability as the light-emitting molecule. The device contains a graded bilayer structure of the PVK film covered with the dendrimer film prepared by sequential spin-casting of the dendrimer layer from a solvent that only swells the PVK layer. The bilayer device demonstrated a significantly enhanced electoluminescence quantum efficiency compared with the dendrimer single layer device or the PVK : dendrimer blend device with optimized composition. We also prepared composite LEDs with an MEH-PPV : emissive dendrimer blend. By doping the electron-deficient MEH-PPV layer with a small amount of the distyrylanthracene-triazine-based dendrimer, we could not only enhance the device performance but also depress the long-wavelength emission of MEH-PPV.",
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Dual functions of a new n-type conjugated dendrimer : Light-emitting material and additive for polymer electroluminescent devices. / Park, Jong Hyeok; Kim, Chulhee; Kim, Young Chul.

In: Journal of Physics D: Applied Physics, Vol. 42, No. 3, 035101, 08.04.2009.

Research output: Contribution to journalArticle

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