Here, we show how the simulation software Laoss can be used to quantitatively analyze optical and electrical cross-talk effects in white organic light-emitting diode (WOLED) / color filter (CF) displays. Optical light leakage is found to be highly influenced by the topography of the pixel definition layer (PDL) while it only shows little correlation with OLED parameters, such as the emitter orientation. Electro-optical simulations exemplify the importance of electrical and optical cross-talk to be dominant in different voltage ranges. 1. Introduction A considerable number of smartphone and television displays are nowadays made of OLEDs due to their high level of sharpness, contrast ratio, and stunning color gamut. Basically, there are two different ways on how the primary colors are generated. Either they are directly generated by using blue, green, and red OLEDs, or the light of a common white OLED is filtered by selective color filters. The RGB approach is typically energy-efficient but requires precise engineering work during fabrication. Because of the higher defect tolerance, the WOLED/CF approach is often used for large-area applications, such as television screens.

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