Organic thin-film devices on paper substrates

A high-performance polymer thin-film transistor fabricated on a paper substrate has been demonstrated. As a water barrier layer, parylene was coated on a paper substrate by using a vacuum deposition process. Using poly (3-hexylthiophene) as an active layer, a polymer thin-film transistor with a field-effect mobility of up to 0.086 cm(2)/V-sec and an on/off ratio of 104 was achieved. The fabrication of a polymer thin-film transistor built on an inexpensive paper substrate is expected to open a channel for future applications in flexible and disposable electronics with extremely low cost.