Abstract
Abstract Substrate surface roughness predominantly influenced grain size of pentacene in vacuum-deposited thin films while surface energy of the substrate did not, i.e., larger pentacene grain was obtained on a substrate with lower roughness instead of lower surface energy. On the other hand, grain size of C60 deposited in the same manner was influenced by both surface energy and roughness, i.e., large C60 grain was obtained on substrates with lower surface roughness and energy.
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