18 May 1999 Hybrid bilayer organic light-emitting devices based on high Tg hole transport polymers
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Abstract
We report on organic electroluminescent devices based on Al cathode with luminous efficiency of 20 lm/W and external quantum efficiency of 4.6 percent. When pulsed in air at room temperature and without any encapsulation, high peak brightness of 4.4 X 106 cd/m2 and high efficiency of 4.4 cd/A are obtained. In contrast to current belief, we demonstrate that device quantum efficiency can be increased by tuning the ionization potential of the hole-transport moieties. The high efficiency and peak brightness reported here with Al cathode are encouraging for the manufacturing of stable devices and the development of electrically injected organic lasers.
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Ghassan E. Jabbour, Sean E. Shaheen, Michael M. Morrell, Jeffrey D. Anderson, Paul A. Lee, Sankaran Thayumanavan, Stephen Barlow, Seth R. Marder, Erika Bellmann, Robert H. Grubbs, Bernard Kippelen, Neal R. Armstrong, Nasser Peyghambarian, "Hybrid bilayer organic light-emitting devices based on high Tg hole transport polymers", Proc. SPIE 3623, Organic Photonic Materials and Devices, (18 May 1999); doi: 10.1117/12.348406; https://doi.org/10.1117/12.348406
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