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Chemical changes on the green emitter tris(8-hydroxy-quinolinato)aluminum during device aging of -structured organic light emitting diodes
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/content/aip/journal/apl/95/18/10.1063/1.3257380
2009-11-06
2014-07-30

Abstract

Metal organic fluorescent and phosphorescent emitters are widely used in organic light emitting devices (OLEDs). Iridium-based triplet emitters are known to undergo chemical reactions with other materials during OLEDaging. The material tris(8-hydroxy-quinolinato)aluminum , which is widely used as electron transporting material and green fluorescent emitter, degrades mainly during hole transport. We investigate the chemical changes in during device aging: using laser desorption ionization time-of-flight mass spectrometry, we study the reaction products found in degraded OLEDs. Similar to the reactions known from the phosphorescent iridium-based emitters, undergoes a dissociation and further reaction with the hole blocking material 4,7-diphenyl-1,10-phenanthroline.

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Scitation: Chemical changes on the green emitter tris(8-hydroxy-quinolinato)aluminum during device aging of p-i-n-structured organic light emitting diodes
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/18/10.1063/1.3257380
10.1063/1.3257380
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