Abstract
Single layer devices of the organolanthanide complex, terbium Tris-(1-phenyl-3-methyl-4-(tertiarybutyryl)pyrazol-5-one)triphenylphosphine oxide [(tb-PMP) 3Tb(Ph 3PO)] were made to investigate its light emission and current transporting properties. Ca and Mg layers were used for the cathode contact. A higher current density at much lower voltages can be attained with Ca cathode because of the enhanced electron injection. The maximum brightness of a single layer device with a Ca cathode was 226 cd/m 2 at 18 V and the best electroluminescence (EL) efficiency was 0.67 cd/A at 14 V and 70 cd/m 2.
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