Journal
APPLIED PHYSICS LETTERS
Volume 86, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1953883
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We have developed highly efficient white top-emitting organic light-emitting devices with broad emission by modifying both the anode and cathode. To alleviate the undesirable microcavity effect and obtain broad white emission, a CFx-coated Ag anode and an index-matching layer (SnO2) capped on a thin Ca/Ag cathode with a maximum transparency of 80% were employed. A top-emitting broad white-light device, based on the dual-layer architecture of light blue and yellow emitters with one of the highest EL efficiencies of 22.2 cd/A (9.6 1m/W) at 20 mA/cm(2) and 7.3 V with Commission Internationale d'Eclairage coordinates of (x = 0.31, y = 0.47), has been demonstrated. (c) 2005 American Institute of Physics.
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