Organic light emitting devices containing a highly substituted isoindole or polyisoindole

A highly substituted and fluorescent Isoindole has been used in a bilayer type of organic electroluminescent device with either PVK or Alq 3. The best results (maximum luminance >6000 cd/m 2, apparent quantum yield at max luminance of 1.1%, and a low threshold voltage of 4 V) are obtained for the...

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Bibliographic Details
Published in:Thin solid films 1999-09, Vol.353 (1), p.218-222
Main Authors: Gauvin, S., Santerre, F., Dodelet, J.P., Ding, Y., Hlil, A.R., Hay, A.S., Anderson, J., Armstrong, N.R., Gorjanc, T.C., D'Iorio, M.
Format: Article
Language:English
Subjects:
Applied sciences
Electronics
Exact sciences and technology
Hole transport
Isoindole
Light emitting device
Optoelectronic devices
Organic layer
Polyisoindole
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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Summary:A highly substituted and fluorescent Isoindole has been used in a bilayer type of organic electroluminescent device with either PVK or Alq 3. The best results (maximum luminance >6000 cd/m 2, apparent quantum yield at max luminance of 1.1%, and a low threshold voltage of 4 V) are obtained for the combination: anode/Isoindole/Alq 3/cathode. These devices are characterized by the Alq 3 electroluminescent spectrum. The role of Isoindole is that of a hole transport material. This is in agreement with the reversible character of Isoindole electrochemical oxidation and the stability of the Isoindole cation radical in solution. Lower maximum luminances (∼30 cd/m 2) are obtained when Isoindole is replaced with Polyisoindole, a polymer containing the Isoindole in its backbone.
ISSN:0040-6090
1879-2731
DOI:10.1016/S0040-6090(99)00391-0