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Excimer-based red/near-infrared organic light-emitting diodes with very high quantum efficiency
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/content/aip/journal/apl/92/11/10.1063/1.2898159
2008-03-17
2014-12-28

Abstract

Various light output measures of red/near-infrared (NIR) excimer-based organic light-emitting diodes(LEDs) are reported for different cathodes (Al, , Ca, and ). By using a selected phosphor from a series of terdentate cyclometallated efficient phosphorescent Pt(II) complexes, , as the neat film emitting layer and a cathode, the authors achieve unusually high forward viewing external quantum efficiencies of up to 14.5% photons/electron and a power conversion efficiency of up to 6% at a high emission forward output of . These are the highest efficiencies reported for a NIR organic LED. Electron tunneling through thin insulating layers of LiF and and the difference in band bending at the organic electron transporting layer and the cathode between the samples are used to explain this performance achievement.

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Scitation: Excimer-based red/near-infrared organic light-emitting diodes with very high quantum efficiency
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/11/10.1063/1.2898159
10.1063/1.2898159
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