Fig. 1. (Color online) (a) Schematic diagram of the self-healed PEDOT: PSS/Ga₂O₃ based UV photodetector. (b) Cross-sectional SEM image of the device. (c) SEM image of the Ga₂O₃ nanorods. (d) SEM image of the junction and (e) SEM image of the Ag NWs electrode.

Fig. 2. (Color online) (a) XRD patterns of the Ga₂O₃ nanorods. (b) The UV-vis absorption spectra and bandgap of Ga₂O₃. (c) Infrared spectroscopy spectrum and (d) the transmission spectra and UV-vis absorption of PEDOT: PSS films.

Fig. 3. (Color online) (a) Self-healing of the agarose/PVA hydrogel. (b) Self-healing mechanism of the agarose/PVA DN hydrogel. (c) Photos of hydrogel samples with or without LiCl in -80 °C. (d) Schematic of the hydration of LiCl in water.

Fig. 4. (Color online) (a) I-V curves of the self-powered photodetector. (b) The photocurrent and responsivity of the photodetector. (c) Energy band diagram of the PEDOT: PSS/Ga₂O₃. (d) I-t curves of the photodetector before and after self-healing.