Abstract
Organic electroluminescent (OEL) devices with trivalent thulium (Tm 3+) complex (Tm(acetylacetonato) 3(monophenanthroline) [Tm(AcA) 3phen]) as an emitting layer were fabricated. Double-layer type cells with a structure of glass substrate/indium–tin oxide (ITO)/poly-(vinylcarbazole) (PVK)/Tm complex/Al exhibit blue luminescence when forward bias dc voltage was applied. Spectrally-narrow OEL emission at 482 nm from Tm 3+ ion in Tm complex was observed.
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