Fig. 13.

a The all-solid-state SCPC can power smartwatch, sports bracelet, and LEDs. Reprinted with permission from Ref. [11]. b Circuit diagram of the energy supply mode and photographs of showing two LEDs being powered by the SCMPU, the SCMPU inserted in the insole of a shoe and using the SCMPU to drive a commercial hygrothermograph. Reprinted with permission from Ref. [15]. c Operation of green light-emitting diode using serially connected SCSPCs as the power source. Reprinted with permission from Ref. [17]. d Photograph of a calculator driven by the SCPF. Reprinted with permission from Ref. [18]. e Photographs of the twisted Li-ion battery to light up a green LED. Reprinted with permission from Ref. [19]. f Photographs of the fabricated devices can instantaneous lightning of four commercial red LEDs upon repeated finger imparting and lightning of a green LED light with adequate intensity. Meanwhile, power-up small electronic wrist watch, commercial digital calculator, mobile LCD screen, and portable speaker. Reprinted with permission from Ref. [21]