fig6

Figure 6. Flexible photovoltaic electrical stimulation device based on organic photoelectric capacitors. (A) Schematic diagram of a photoelectric capacitor composed of sequentially deposited Cr/Au and H₂P_C (p-type) and PTCDI (n-type)^[12]. Reprinted with permission. Copyright 2018, John Wiley and Sons; (B) Schematic diagrams of three OEPC devices, p-type: H₂P_C (P), n-type: PTCDI, and the blue overlay in type II and type III represents the PEDOT:PSS coating^[59]. Reprinted with permission. Copyright 2020, John Wiley and Sons; (C) OEPC achieves wireless stimulation of the sciatic nerve in mice^[60]. Reprinted with permission. Copyright 2022, Nature Research. EMG: Electromyography; ITO: indium tin oxide; MEA: monoethanolamine; OEPC: organic electrolytic photocapacitor; PEDOT: poly(3,4-ethylenedioxythiophene); PEDOT:PSS: poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); PN: photoconductor nanocrystalline; PTCDI: photoconductor nanocrystalline.