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Proceedings Paper

Lanthanum-based cathodes for organic light-emitting devices
Author(s): Marie D'Iorio; Tim Gorjanc; M. Roussy; J. Lam; B. Williams
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Paper Abstract

The fabrication of organic light emitting diodes with vacuum sublimed molecules is emerging as a competitive flat panel display alternative because of brightness, efficiency and operating lifetimes of these devices. The requirement for a low work function metal as a cathode limits the choice of materials to reactive elements such as magnesium, calcium, lithium that can be alloyed or co-deposited with silver or aluminum for greater stability and lifetime of the device. From the scandium-subgroup of elements, we have investigated lanthanum as a potential cathode because preliminary studies indicated that the electroluminescence onset could occur as low as 4 volts. Current-voltage, Auger spectroscopy and spectro-photometric data will be presented on standard devices using indium tin oxide, triphenyl diamine derivative and aluminum quinolinate and lanthanum-based cathodes.

Paper Details

Date Published: 16 December 1998
PDF: 6 pages
Proc. SPIE 3476, Organic Light-Emitting Materials and Devices II, (16 December 1998); doi: 10.1117/12.332633
Show Author Affiliations
Marie D'Iorio, National Research Council Canada (Canada)
Tim Gorjanc, Univ. of Ottawa (Canada)
M. Roussy, Univ. de Montreal (Canada)
J. Lam, Univ. of Ottawa (Canada)
B. Williams, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 3476:
Organic Light-Emitting Materials and Devices II
Zakya H. Kafafi, Editor(s)

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