Organic electroluminescent devices with polymeric materials

Junji Kido; Masafumi Kohda; Katsuro Okuyama; Katsutoshi Nagai; Yoshiyuki Okamoto

doi:10.1117/12.151166

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27 August 1993 Organic electroluminescent devices with polymeric materials

Junji Kido, Masafumi Kohda, Katsuro Okuyama, Katsutoshi Nagai, Yoshiyuki Okamoto

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Proceedings Volume 1910, Electroluminescent Materials, Devices, and Large-Screen Displays; (1993) https://doi.org/10.1117/12.151166
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

Abstract

Electroluminescent devices with double organic layers were fabricated using polymeric materials as the hole transport layer and tris(8-quinolinolato)aluminum(III) complex (Alq) as the emitting layer, respectively. The polymeric materials used are poly(methylphenylsilane), plasma-polymerized carbon disulfide, and polycarbonate (TPD). A cell structure of glass substrate/indium-tin-oxide (ITO)/polymer layer/Alq/Mg:Ag (10:1) or Mg/Ag was employed. Among the polymeric systems, the doped PC system affords efficient electroluminescence from the Alq layer. In this cell, bright green emission with luminance of 7,700 cd/m² was observed at a drive voltage of 16 V. Single-layer-type EL devices were also fabricated using poly(methyl methacrylate) (PMMA) molecularly doped with both TPD and Alq. A cell structure of glass substrate/ITO/doped PMMA/Mg:Ag (10:1) was employed. Green emission with luminance of 920 cd/m² was achieved for a cell with a TPD/Alq ratio of 0.67 at a drive voltage of 17 V, and the EL color was tuned to blue-green and yellow-orange by further doping the PMMA layer with suitable organic dyes.

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Junji Kido, Masafumi Kohda, Katsuro Okuyama, Katsutoshi Nagai, and Yoshiyuki Okamoto "Organic electroluminescent devices with polymeric materials", Proc. SPIE 1910, Electroluminescent Materials, Devices, and Large-Screen Displays, (27 August 1993); https://doi.org/10.1117/12.151166

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