A multilayer, blue-emitting electroluminescent device based on a novel, thermally stable, amorphous molecular material with electron-transport properties, BMB-2T (the title compound, see also the Figure), is described. Its fabrication and performance are reported. It is shown that the device efficiency increases when a thin layer of another new amorphous material is inserted between the BMB-2T and the hole-transporting layer to prevent exciplex formation.
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Noda et al. (1999) studied this question.