Strongly-directed emission from microcavity structure in electroluminescent diodes with europium complex as an emitter

Summary form only given. Multilayer electroluminescent diodes with sharp red emission were fabricated using a new europium complex as an emitter. Microcavity structures were introduced into the EL diodes with sharp red emission. The device structures were composed of pairs of SiO/sub 2//TiO/sub 2/ dielectric reflector, indium-tin-oxide electrode, hole transport layer, europium complex as an emission layer, electron transport layer and MgAg electrode. The dielectric reflector and the MgAg metal electrode constituted a planer microcavity, and sharply directed emission from europium complex was observed when operated under dc drive voltage at room temprature. The relation between emission angle and the size of microcavity was discussed.