Flexible In2O3 Nanowire Transistors on Paper Substrates

Flexible In
₂
O
₃
nanowire transistors gated by microporous SiO
₂
-based solid electrolytes are fabricated on paper substrates at room temperature. Low-voltage (1.0 V) operation of these devices is realized owing to the large electric-double-layer capacitance of (1.73 μF/cm
²
at 20 Hz) of the microporous SiO
₂
solid electrolytes, which were deposited at room temperature. The subthreshold swing, current on/off ratio, and field-effect mobility of the paper-based nanowire transistors are estimated to be 74 mV/decade, 1.7×10
⁶
, and 218.3 cm
²
/V·s, respectively. These low-voltage paper-based nanowire transistors show promise for use in portable flexible paper electronics and low-cost portable sensors.