Phase dependence of single crystalline transistors of tetrathiafulvalene

The aim of this study is to establish the structure-properties relationship of tetrathiafulvalene (TTF). After this study (1) TTF crystals with α and β phases were controllably obtained by the cast method with careful selection of the solvents, and (2) organic field-effect transistors (OFETs) of α and β phases both exhibited field-effect performance, and the performance of α phase was much better than that of β phase. The highest mobility of α phase reached 1.2cm2V−1s−1, while β phase showed the maximum mobility only about 0.23cm2V−1s−1, indicating the strong performance dependence of OFETs performance on the crystal phases.