1 research outputs found
Growth, Structure, and Anisotropic Optical Properties of Difluoro-anthradithiophene Thin Films
Anthradithiophene
(ADT) and its functionalized derivatives have
proven to be attractive for high-performance electronic devices based
on small-molecule organic semiconductors. In this manuscript we investigate
the structural and optical properties of thin films of difluoro-anthradithiophene
(diF-ADT), an ADT derivative, grown by organic molecular beam deposition
(OMBD). By grazing incidence X-ray diffraction and reciprocal space
maps, we show that diF-ADT crystallizes in a thin film structure similar
to the single crystal unit cell. In addition, we investigate the growth
characteristics with atomic force microscopy (AFM) and show an increase
of surface mound sizes with elevated substrate temperature. Optical
absorption measurements reveal a clear vibronic progression in both
solution and thin film spectra along with a distinct optical anisotropy
related to the molecular orientation in thin films