Spectral Characteristics of Organic Light-Emitting Diodes with (SiO2/TiO2) Dielectric Layers

In this paper, the spectral characteristics of red (R), green (G), blue (B) organic light-emitting diodes (OLEDs) with a pair of (SiO2/TiO2) dielectric layers are studied. Multilayer structures of small-molecule RGB OLEDs are designed using an optical model. Simulated and measured electroluminescence spectra, luminous efficiencies, luminances, and CIE chromaticity coordinates of the RGB OLEDs with (SiO2/TiO2) dielectric layers are compared with those for conventional RGB OLEDs. The results show that the luminous efficiencies for green and red OLEDs with the dielectric layers in the forward direction are 1.81 and 1.69 times larger than those for conventional green and red OLEDs, respectively. Also, the color purity is improved so that the color gamut area is increased.lication/vnd.m KCI Citation Count: 4