Impact of graphene-molecular interaction on collective orientation barrier for organic film growth

Abstract The temperature-dependent molecular orientation variation of pentacene (PEN) on a graphene-covered substrate (PEN/Gr) was investigated via p-polarized multiple-angle incidence resolution spectrometry (pMAIRS). temperature regime the transition PEN/Gr different from that PEN/SiO 2 . collective barrier (COB), an energy molecules need to overcome form standing orientation, estimated pMAIRS. Consequently, COB found be 10 times larger than This indicated is valuable for understanding effect interaction orientation.