Fig. 5: Proof-of-concept for IS-OPV.

a A wearable wireless electromyography (EMG) monitoring prototype charged by IS-OPVs fitted and packed as part of the elastic wristband. b The collected signals and the maximum operation time of the wireless EMG monitoring prototype in outdoor sunlight sports scenes (with and without IS-OPV power supply devices). c The power output of IS-OPVs with different areas under different light intensities estimated based on a PCE of 16.5%.