Effect of doping of Li-complex on charge injection and transport in tris(8-quinolato) aluminum layer

Tetsuo Tsutsui; Takeshi Yasuda; Hisao Ikeda; Dechun Zou

doi:10.1117/12.416889

2 February 2001 Effect of doping of Li-complex on charge injection and transport in tris(8-quinolato) aluminum layer

Tetsuo Tsutsui, Takeshi Yasuda, Hisao Ikeda, Dechun Zou

Proceedings Volume 4105, Organic Light-Emitting Materials and Devices IV; (2001) https://doi.org/10.1117/12.416889
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Thin buffer layers composed of tris(8-quinolato) aluminum (Alq) layer doped with Li-acetylacetonate (Li-acac), Mg-acac and magnesium metal were inserted between an MgAg cathode and an Alq electron transport layer in standard double-layer devices with the ITO/TPD/Alq/MgAg structure. The insertion of the buffer layers with Li-acac brought about large decrease in drive voltage. While the effects of Mg-acac and magnesium metal were smaller than the case of Li-acac. Electron drift mobility of Alq layers doped with Li-acac and magnesium metal was evaluated by using a time-of-flight method. Large increases of electron mobility as well as the increase of dark conductivity with doping were found.

Citation Download Citation

Tetsuo Tsutsui, Takeshi Yasuda, Hisao Ikeda, and Dechun Zou "Effect of doping of Li-complex on charge injection and transport in tris(8-quinolato) aluminum layer", Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); https://doi.org/10.1117/12.416889

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