Egg albumen-based biopolymer electrolyte lateral capacitive coupling thin-film transistors on logical operation

Abstract

Recently, green electronic products are receiving increasing attention from scientists. Here, biodegradable lateral capacitively coupled electric-double-layer (EDL) oxide-based thin-film transistors (TFTs) were fabricated on a flexible paper substrate. The TFTs exhibit good performance due to the extremely high EDL capacitance of the egg albumen based electrolyte. Good transistor performances against mechanical stress were observed. In the coplanar double-gate structure, the high-low level of the different periods is input to the two gates to realize the logical function ‘AND’ operation. Resistor loaded inverters were built, exhibiting full-swing amplitude and high-voltage gain at low operating voltages, and implementing ‘NOT’ logic function. And the inverters were used to realize the conversion of the noise signal to the two-bit output. Therefore, the proposed lateral capacitively coupled TFTs may have potential applications in low-cost green portable logic computing devices. Laterally capacitively coupled TFTs were fabricated on a paper substrate by using egg albumen solid electrolyte film as a gate dielectric. The TFTs exhibit good performance due to the extremely high EDL capacitance of the egg albumen based electrolyte. AND logic operations and NOT logic functions are implemented on TFTs based on this lateral planar coupling structure. • Thin-film transistors (TFTs) with lateral capacitive coupling are fabricated on a paper substrate using natural egg albumen as gate dielectric. •These egg albumen-based flexible TFTs can implement logic operation functions under low voltage conditions and have excellent noise immunity. •The proton movement mechanism of lateral capacitive coupling in an external electric field is explained in our coplanar-gate structure of TFTs.