Abstract
Electro-fluidic display (EFD) is one of the most promising reflective displays because of its full color and video speed. Colored EFD oil, which normally consists of soluble organic dyes and non-polar solvent, plays a critical role in color, electro-optical behavior, and the reliability of the EFD devices. In this paper, we report our research on two kinds of electro-fluidic dyes based on anthraquinone and azo pyrazolone, including their synthesis, structure characterization, and application properties. Changes of absorbance curves, color coordinates of oils, and photoelectric responses of devices were studied in detail under accelerated irradiation to investigate the photo-stability and reliability properties of synthesized oil materials and devices. Photoelectric responses and photo stability of dyes are highly varied depending on their structures. We found that 1,4-dlialkylamino anthraqinone and mono azo pyrazolone dyes are much more stable than 1,8-dlialkylamino anthraqinone and corresponding bisazo pyrazolone dyes.
Highlights
Electro-fluidic display as an emerging display technology has received widespread attention [1,2,3,4]
Colored oils act as optical switches in electro-fluidic display, which affect the color gamut and the contrast ratio, electro-optical response, and the lifetime for outdoor display devices
Good solubility in non-polar solvent, and good light stability are the main characteristics for the designation of soluble organic dyes
Summary
Electro-fluidic display as an emerging display technology has received widespread attention [1,2,3,4]. In their designation lifetime, color dyes will decompose and their color image as well as their response properties will deteriorate. Color dyes will decompose and their color image as well as their response properties will deteriorate In this context, we have synthesized two typical electro-fluidic display (EFD) dyes (anthraquinone and azo pyrazolone dyes), and their electro-optical behavior, photo-stability properties, and structure correlation were researched in detail in this paper
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