Highly Semiconducting One-Dimensional Porous ZnO Nanorod Array Nanogenerators for Mechanical Energy Harvesting Functions

Figure 9

(a) Output voltage and current values of the M: ZnO NR TENG with various external load resistances. (b) Measured power density curves as a function of external load resistances. (c) The charging and discharging rectified voltage curve used to power up the LEDs using the M: ZnO NR TENG. The inset shows the photographic images of red color LEDs operated using the M: ZnO NR TENG device. (d) The corresponding equivalent electric circuit of the M: ZnO NR TENG-based self-charging system.

(a)

(b)

(c)

(d)