The synthesis of thermally-stable red dyes for LCD color filters and analysis of their aggregation and spectral properties

Three thermally-stable red dyes of azo, quinacridone and perylene derivatives were synthesized and dye-based color filters were manufactured for use in liquid crystal displays. The aggregation behavior of the dyes and their spectral properties in film state were investigated using field emission sca...

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Bibliographic Details
Published in:Dyes and pigments 2011-02, Vol.88 (2), p.166-173
Main Authors: Sakong, Chun, Kim, Young Do, Choi, Jae-Hong, Yoon, Chun, Kim, Jae Pil
Format: Article
Language:English
Subjects:
Agglomeration
Aggregates
Aggregation
Azo
Color
Color filters
Dye-based color filters
Dyes
Intermolecular interaction
Liquid crystal displays
Spectra
Spectral emissivity
Thermal stability
Transmittance
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Summary:Three thermally-stable red dyes of azo, quinacridone and perylene derivatives were synthesized and dye-based color filters were manufactured for use in liquid crystal displays. The aggregation behavior of the dyes and their spectral properties in film state were investigated using field emission scanning electron microscopy and concentration-dependent spectroscopy. Aggregate size was related to the geometry of the three dye types rather than their size, with average aggregate sizes ranging from 35 nm (azo), 80 nm (quinacridone) to 25 nm (perylene). Aggregation behavior affected the spectral property of the red color filter, resulting in weaker and broader transmittance spectrum with higher aggregation.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2010.06.003