Patent ID: 7560862
Filing Date: 2009-07-14
Classification: H01L,Y10S

Abstract:
1. A tandem white OLED comprising: a) an anode; b) a cathode; c) at least one broadband electroluminescent unit disposed between the anode and the cathode, wherein the broadband electroluminescent unit includes at least one light-emitting layer and produces at least one color component having an intensity less than desired, and wherein one of the broadband electroluminescent unit(s) includes at least three light-emitting layers, and wherein each of the light-emitting layers has a different color of emission; d) at least one color-compensating electroluminescent unit disposed between the anode and the cathode, wherein the color-compensating electroluminescent unit is selected to produce the at least one color component and to increase the color component intensity, and wherein the color-compensating electroluminescent unit includes means for providing electron-hole recombination to produce light; and e) an intermediate connector disposed between each adjacent electroluminescent unit, wherein the intermediate connector has no direct connection to an external power source.