Fig. 1. Diagram of flexible TFT fabricated on nano-paper substrate. (a) Schematic illustration; (b) digital photo

Fig. 2. Microphotographs of TFT device.(a) Optical microscope image of TFT device with a smooth channel; (b) STEM image of TFT device; (c) EDS mapping of TFT device; (d) AFM images of substrate, buffer layer, insulation layer, and active layer of TFT device

Fig. 3. Channel layer of IGZO.(a) HRTEM image of IGZO channel layer; (b) EDS mapping of nano-paper TFT; (c) element distribution map of Ga、In, and Zn; (d) electron diffraction pattern of IGZO channel layer; (e) EDS line scan of IGZO layer

Fig. 4. Electron transport mechanism in channel layer. (a) Plot of (αhν)² versus hν for Al₂O₃ and IGZO; (b) schematic of electron transport between Al₂O₃ and IGZO

Fig. 5. Electrical properties of paper-based TFT. (a) Output and (b) transfer characteristics of nano-paper TFT; (c) I-V characteristics of MIM capacitor with Al₂O₃ insulator on nano-paper substrate; (d) XPS O1s core spectra of IGZO/Al₂O₃ layer

Fig. 6. Stable performance of paper-based TFT. (a) PBS and (b) NBS results; (c) V_on shift of nano-paper TFT