Extremely low voltage white organic light-emitting devices (WOLEDs) with fluorescent emitters are realized exploiting structure. White light is obtained by two complementary colors system, in which the yellow and the blue emitting components are based on 5,6,11, 12-tetraphenylnaphthacene (rubrene) and 4,4-bis-2, 2-diphenylvinyl-1, 1-spirobiphenyl (Spiro-DPVBi), respectively. The effects on the device performances of various electron blocking layers and hosts for rubrene are discussed. The best device shows a luminance of at bias of as low as , and at with a maximum power efficiency of . The Commission Internationale de 1’Eclairage chromaticity coordinates change from (0.36, 0.45) at to (0.33, 0.42) at showing high color stability.
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© 2008 American Institute of Physics.
2008
American Institute of Physics
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