Organic electronics on paper

We have fabricated organic thin-film transistors and ring oscillators on paper and on flexible polyetherether ketone film using small-molecule hydrocarbon pentacene as the semiconductor and solution-processed polyvinylphenol as the gate dielectric. Transistors on paper have a carrier mobility of $\text{0.2\hspace{0.5em}}{\mathrm{cm}}^2/\mathrm{V} \mathrm{s}$ and an on/off current ratio of ${10}^6,$ similar to devices on polyetherether ketone. A signal propagation delay of $\text{22\hspace{0.5em}μ}\mathrm{s}$ per stage was measured for pentacene ring oscillators on polyetherether ketone film, and a signal delay of 12 ms was obtained for ring oscillators on paper.