The synthesis and application of novel benzodithiophene based reactive mesogens with negative wavelength dispersion birefringence

James D.W. Allen, Kevin Adlem, Martin Heeney

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Optical corrective retardation films are widely used in the display industry to compensate for a variety of imperfections such as off-axis contrast reduction, grey-scale inversion and colour shifts in LCDs and backplane reflections in OLEDs. A wide variety of these films have been produced by multiple methods, however, obtaining ideal wavelength dispersion remains difficult and costly to achieve in thin, single-layer systems. In this work, we report the synthesis of a novel series of reactive mesogen materials designed to exhibit negative wavelength dispersion birefringence. This series of photopolymerisable materials based on a benzodithiophene core exhibiting either an ‘X’-shaped or ‘T’-shaped geometry were synthesised. Their negative wavelength dispersion birefringence properties were investigated in aligned films prepared from photo-polymerised reactive mesogen host mixtures. The nature of the substituents on the BDT core was found to have a significant impact on performance, and materials with an X-shaped geometry were found to exhibit much higher performance than those with a T-shape.
Original languageEnglish (US)
Pages (from-to)17419-17426
Number of pages8
JournalJournal of Materials Chemistry C
Volume9
Issue number48
DOIs
StatePublished - Dec 28 2021
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-14

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