A top-emitting organic light-emitting device (TOLED) with an architecture of Si/SiO 2 /Ag/Ag 2 O/4, 4', 4''-tris(3-methylphenylphenylamino) triphenylamine/4, 4'-bis[ N -(1-naphthyl-1-)- N -phenyl-amino]-biphenyl/ tris-(8-hydroxyquinoline) aluminium (Alq 3 )/LiF/Al/semitransparent Ag is designed with the resonance wavelength in the TOLED corresponding to the emission peak of Alq 3 . With this optimized cavity structure, light magnification with a coefficient of ∼16 (in the forward direction) is observed, leading to significantly improved performances such as a brightness of 100529 cd m −2 (12.5 V), a large luminous efficiency of 10.4 cd A −1 (7 V) and an external quantum efficiency of 2.94% (5 V).
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Chen et al. (2006) studied this question.
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