Stable 6,13-bis(4-pentylphenylethynyl) pentacene thin-film transistor by Ink-jet printing

We studied the fabrication of stable ink-jet printed organic thin-film transistors (OTFTs) with printed source/drain electrodes. On the top of printed Ag source/drain electrodes, 6, 13-bis(4-pentylphenylethynyl) pentacene was ink-jet printed as an active semiconductor. The printed OTFT exhibited the field-effect mobility of 0.042 cm2/V, an on/off current ratio of 106, a threshold voltage of 2.9 V and the gate voltage swing of 0.6 V/dec. The printed OTFT shows negligible hysteresis in air and stable performance under gate bias stress.