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Proceedings Paper

Electroluminescent devices incorporating a new oxadiazole derivative
Author(s): Gun-Young Jung; Changsheng Wang; Christopher Pearson; Martin R. Bryce; Ifor D. W. Samuel; Michael C. Petty
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Paper Abstract

Organic bilayer light emitting devices have been constructed using rubrene-doped poly(2-methoxy-5(2'-ethylhexyloxy)-p- phenylenevinylene) (MEH-PPV) as the emissive material and a novel hybrid compound consisting of pyridine and oxadiazole -- 2,5-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5- yl]pyridine (PDPyDP) -- as an electron transport layer. Although such structures exhibited a higher external quantum efficiency than those in which the electron transport layer was 1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5- yl]benzene (OXD-7) they degraded relatively quickly, both in storage and under an electrical stress. Considerable improvements in the device lifetimes were obtained by the insertion of a copper phthalocyanine layer between the anode and the MEH-PPV layer and a tris (8-hydroxyquinoline) aluminum (Alq3) layer between the PDPyDP layer and the Al electrode.

Paper Details

Date Published: 2 February 2001
PDF: 9 pages
Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); doi: 10.1117/12.416909
Show Author Affiliations
Gun-Young Jung, Univ. of Durham (United Kingdom)
Changsheng Wang, Univ. of Durham (United Kingdom)
Christopher Pearson, Univ. of Durham (United Kingdom)
Martin R. Bryce, Univ. of Durham (United Kingdom)
Ifor D. W. Samuel, Univ. of Durham (United Kingdom)
Michael C. Petty, Univ. of Durham (United Kingdom)

Published in SPIE Proceedings Vol. 4105:
Organic Light-Emitting Materials and Devices IV
Zakya H. Kafafi, Editor(s)

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