White organic light-emitting devices using a phosphorescent sensitizer
The efficiency of white organic light-emitting devices has been improved dramatically by the
introduction of a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir (ppy) 3] as a
sensitizer. Ir (ppy) 3 and 4-(dicyanomethylene)-2-t-butyl-6-(1, 1, 7, 7-tetramethyljulolidyl-9-
enyl) are codoped into 4, 4′-N, N′-dicarbazole-biphenyl (CBP) host. The chromaticity of
white emission can be tuned by adjusting the thickness of the codoped CBP layer or the
concentration of Ir (ppy) 3. The luminance efficiency of these devices is affected at the same …
introduction of a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir (ppy) 3] as a
sensitizer. Ir (ppy) 3 and 4-(dicyanomethylene)-2-t-butyl-6-(1, 1, 7, 7-tetramethyljulolidyl-9-
enyl) are codoped into 4, 4′-N, N′-dicarbazole-biphenyl (CBP) host. The chromaticity of
white emission can be tuned by adjusting the thickness of the codoped CBP layer or the
concentration of Ir (ppy) 3. The luminance efficiency of these devices is affected at the same …
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