Patent ID: 6727644
Filing Date: 2004-04-27
Classification: C09K,H01L

Abstract:
An organic light-emitting device comprising:a) a substrate; b) an anode and a cathode positioned relative to the substrate; c) an emission layer disposed between the anode and the cathode; d) a hole-transport layer disposed between the anode and the emission layer; e) an electron-transport layer disposed between the cathode and the emission layer; f) the hole-transport layer including one or more sublayers, the sublayer closest to the emission layer containing a first color-neutral dopant; g) the emission layer containing the first or another color neutral dopant; and h) the color-neutral dopant(s) including an anthracene derivative between 0.1 and 25 percent by volume of each layer or sublayer in which any of said color-neutral dopant(s) is present.