Patent ID: 8174182

Claim:
An OLED device for producing white light, comprising: a) an anode and a spaced cathode; b) first and second light-emitting layers, the first having a blue-green light-emitting material which has a first point on a chromaticity diagram within a first area defined by CIEx=0.07 to 0.20, CIEy=0.25 to 0.40, the second layer having a red-orange light-emitting material which has a second point on a chromaticity diagram within a second area defined by CIEx=0.55 to 0.70, CIEy=0.30 to 0.40 such that, when a line is drawn between the first point and the second point, it passes through a desired white area defined on a chromaticity diagram to be within CIEx=0.27 to 0.39, CIEy=0.27 to 0.39; c) the concentration of the selected first and second materials, so that the white light produced by the OLED device is at a third point substantially on the line in the chromaticity diagram within the desired white area; wherein the blue-green light emitting material is selected from blue-emitting derivatives of distyrylarenes or distyrylamines including bis[2-[4-[N,N-diarylamino]phenyl]vinyl]-benzenes of the general structure N1 shown below or bis[2[4-[N,N-diarylamino]phenyl]vinyl]-biphenyls of the general structure N2 shown below: wherein: R 1 -R 4 can be the same or different, and individually represent one or more substituents; and the red-orange light emitting material includes a diindenoperylene compound of the following structure: wherein X 1 -X 16 are independently selected as hydrogen or substituents that provide red luminescence.