Recent Progress in Triboelectric Nanogenerators as a Renewable and Sustainable Power Source

Figure 16

(a) Device structure of the organic film TENG [72]. (b) Cross-sectional view of the TENG. (c) Dependence of the short-circuit current and the open-circuit voltage and (d) the peak power output on the external load resistance. (e) The signal of sound waveform and short-time Fourier transform. (f) Photograph of a self-powered microphone for sound recording. (g) Schematic diagram of an as-fabricated ultrathin paper-based TENG [73]. (h) Dependence of the peak power output on the external load resistance. (i) A 2 μF capacitor charged by the THEG from the cell phone.