A green top-emitting organic light-emitting device with improved luminance and efficiency

A top-emitting organic light-emitting device (TOLED) with an architecture of Si/SiO2/Ag/Ag2O/ 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 Alq3. With this optimized cavity structure, light magnification with a coefficient of similar to 16 ( in the forward direction) is observed, leading to significantly improved performances such as a brightness of 100529 cd m(-2) (12.5V), a large luminous efficiency of 10.4 cdA(-1) (7V) and an external quantum efficiency of 2.94% ( 5V).