Substrate Dependent Growth of DH6T Small Molecules in Vapor Deposited Thin Films

Substrate dependent growth of DH6T small molecules in the evaporated thin films was studied in order to speculate the role of substrate. XRD data revealed that films grown on both glass and silicon substrates are well ordered, and crystalline in nature with relatively more crystallinity on silicon substrates rather than glass substrate. AFM study showed that step like circular domains with height almost equal to molecular length are formed on both substrates and the grain size is larger on the silicon substrate than on glass. Photoluminescence studies showed that intermolecular interaction is more in the thin films evaporated on silicon substrate.