Abstract

Since Tang and Vanslyke reported bright organic electroluminescent (OEL) devices at low voltages, the problem of improvement of OEL device characteristics and searching new effective OEL materials offer many challenges to the chemists. Although a variety of OEL materials, including organic small molecular materials and polymers, have been synthesized and various emission colors have been obtained [1, 2], some tasks in this field have been unsolved. For instance, a search for new EL materials with extremely sharp spectral bands in order to obtain highly monochromatic light sources is very actual. One of the ways to improve of OEL materials is applying metal coordination compounds with organic ligands. Metal coordination compounds combine the features of both inorganic and organic compounds and offer a variety of molecular structures by changing the metals, ligands, coordination numbers and so on, This diversity of molecular structure gives one an opportunity to tone the electronic properties of the molecules, and hence to tune the optical properties.

© 2000 IEEE