Space-charge-limited electron currents in 8-hydroxyquinoline aluminum
- 3 January 2000
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 76 (1) , 115-117
- https://doi.org/10.1063/1.125674
Abstract
We investigate electron injection and transport in single-layer devices of 8-hydroxyquinoline aluminum sandwiched between two electrodes. Electrodes comprising a thin lithium fluoride layer are compared with co-evaporated magnesium–silver cathodes and with pure aluminum cathodes. By employing both transient and quasistatic current measurements, the impact of the LiF-layer thickness on electron injection is investigated. It is demonstrated that contacts comprising 0.1–0.2 nm LiF and an aluminum capping layer are able to sustain space-charge-limited currents in 8-hydroxyquinoline aluminum. Further, steady-state current–voltage measurements as a function of temperature are discussed with respect to trap distributions in 8-hydroxyquinoline aluminum.Keywords
This publication has 15 references indexed in Scilit:
- Impact of the cathode metal work function on the performance of vacuum-deposited organic light emitting-devicesApplied Physics A, 1999
- Photoemission spectroscopy of LiF coated Al and Pt electrodesJournal of Applied Physics, 1998
- Trap states of tris-8-(hydroxyquinoline) aluminum and naphthyl-substituted benzidine derivative using thermally stimulated luminescenceApplied Physics Letters, 1998
- Measurement of electron/hole mobility in organic/polymeric thin films using modified time-of-flight apparatusSynthetic Metals, 1997
- Lithium–aluminum contacts for organic light-emitting devicesApplied Physics Letters, 1997
- Growth mechanisms of epitaxial metallic oxide SrRuO3 thin films studied by scanning tunneling microscopyApplied Physics Letters, 1997
- Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrodeApplied Physics Letters, 1997
- Light-emitting diodes based on conjugated polymersNature, 1990
- Comparison of the drift mobility measured under transient and steady-state conditions in a prototypical hopping systemPhilosophical Magazine Part B, 1986
- Raumladungsbeschränkte Ströme in Anthrazen als Mittel zur Bestimmung der Beweglichkeit von DefektelektronenThe European Physical Journal A, 1962