Efficient Molecular Organic Light-Emitting Diodes Based on Silole Derivatives

Abstract

We report the performance of molecular organic light-emitting diodes (MOLEDs) using silole derivatives as emissive and electron transport materials. Two siloles, namely 2,5-di-(3- biphenyl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP) and 1,2-bis(1-methyl-2,3,4,5,- tetraphenylsilacyclopentadienyl)ethane (2PSP), with high PL quantum yields of 94% and 85%, respectively, were used as emissive materials. Another silole, namely 2,5-bis-(2',2''-bipyridin-6- yl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), was used as the electron transport material. MOLEDs using these two siloles and NPB as the hole transport material show a low operating voltage of approximately 4.5 V at a luminance of 100 cd/m2 and high external electroluminescence (EL) quantum efficiencies of 3.4% and 3.8%, respectively, at 100 A/m2. MOLEDs based on PPSPP exhibit a red-shifted EL spectrum which is assigned to an exciplex formed at the PPSPP:NPB interface.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2003
Accession Number
ADA447724

Entities

People

  • Antti J. Maekinen
  • Hideyuki Murata
  • Leonidas C. Palilis
  • Manabu Uchida
  • Zakya H. Kafafi

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Current Density
  • Diodes
  • Electron Mobility
  • Electron Transfer
  • Electrons
  • Energy Levels
  • Glass Transition Temperature
  • Light Emitting Diodes
  • Luminance
  • Materials
  • Materials Science
  • Organic Light Emitting Diodes
  • Quantum Efficiency
  • Quantum Yields
  • Thick Films
  • Transition Temperature
  • Transport Protocols

Fields of Study

  • Chemistry

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Solar Photovoltaics and Thermoelectric Devices.

Technology Areas

  • Microelectronics
  • Quantum Computing