Table 1 Structure, function, and representative device figure of merit reported in this study.
Material | Device | Device structure | Dimension | Application | Figure of merita |
---|---|---|---|---|---|
IGZO FN | TFT (CFN = 0.15 µm−1) | Al/IGZO FN/SiO2/Si | W = 1 mm, L = 100 µm | Switch | µ ~  1 cm2 V−1 s−1 Ion/Ioff = 4 × 104 |
 |  |  |  | Gas sensor | RT response LOD = 20 ppb SG = 33.6% ppm−1 |
 | Flexible TFT (CFN = 0.15 µm−1) | Ion-gel/IGZO FN/Au(Ti)/PI | W = 1 mm, L = 50 µm | Switch | µ ~ 0.5 cm2 V−1 s−1 Ion/Ioff = 4 × 104 r = 5 mm, 1000 cycles |
 | Stretchable resistor (CFN = 0.5 µm−1, R = 30–50 MΩ) | PEDOT:PSS/IGZO FN/PEDOT:PSS | W = 1 mm, L = 100 µm | Strain sensor | Gauge factor ~ 15 Elongation ≥50% |
 |  |  |  | Gas sensor | RT response SG = 38–166% ppm−1 Elongation = 50% |
 |  | Cr-Au/IGZO FN/Cr-Au |  | Thermistor | ST = 2.1–2.2% °C−1 Elongation ≥ 10% strain |
 |  |  |  | Breath analyzer | Ion/Ioff = 103 Distinguish different breath frequencies and alcohol test |
 |  |  |  | Photodetector | Rph = 16 mA W−1 Iph/Id = 403 D* = 5.2 × 1010 Elongation = 10% strain |
 | Stretchable resistor (CFN = 2.0 µm−1, R = 1.4 GΩ) | Cu wire/IGZO FN/Cu wire | 1 × 2 cm2 | System integration | Differentiate solar light, temperature, stretch, and breath stimuli |
CuO FN | Stretchable resistor (CFN = 0.5 µm−1, R = 20–30 MΩ) | Cr-Au/CuO FN/Cr-Au | W = 2 mm, L = 50 µm | Pressure sensor | SP = 0.04 kPa−1 LOD = 50 Pa |
 | Stretchable resistor (CFN = 2.0 µm−1, R = 100 MΩ) | Cu wire/CuO FN/Cu wire | 1 × 2 cm2 | System integration | Differentiate solar light, temperature, stretch, and breath stimuli |
ITO FN | Stretchable resistor (CFN = 2.0 µm−1, R = 3–7 MΩ) | Cu wire/ITO FN/Cu wire | 1 × 2 cm2 | Strain sensor | Gauge factor ~ 21 Elongation ≥50% |
 |  |  |  | Motion recognition | Distinguish different finger gestures |
 |  |  |  | System integration | Differentiate solar light, temperature, stretch, and breath stimuli |