Lanthanum-based cathodes for organic light-emitting devices

Marie D'Iorio; Tim Gorjanc; M. Roussy; J. Lam; B. Williams

doi:10.1117/12.332633

16 December 1998 Lanthanum-based cathodes for organic light-emitting devices

Marie D'Iorio, Tim Gorjanc, M. Roussy, J. Lam, B. Williams

Proceedings Volume 3476, Organic Light-Emitting Materials and Devices II; (1998) https://doi.org/10.1117/12.332633
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download Citation

Marie D'Iorio, Tim Gorjanc, M. Roussy, J. Lam, and B. Williams "Lanthanum-based cathodes for organic light-emitting devices", Proc. SPIE 3476, Organic Light-Emitting Materials and Devices II, (16 December 1998); https://doi.org/10.1117/12.332633

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