Spotlight on Charge-Transfer Excitons in Crystalline Textured n-Alkyl Anilino Squaraine Thin Films
Frank Balzer,
Nicholas J. Hestand,
Jennifer Zablocki
et al.
Abstract:Prototypical n-alkyl terminated anilino squaraines for photovoltaic applications show characteristic doublehump absorption features peaking in the green and deep-red spectral range. These signatures result from coupling of an intramolecular Frenkel exciton and an intermolecular charge transfer exciton. Crystalline, textured thin films suitable for polarized spectro-microscopy have been obtained for compounds with n-hexyl (nHSQ) and n-octyl (nOSQ) terminal alkyl chains. The here released triclinic crystal struc… Show more
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