16.4 Energy-autonomous fever alarm armband integrating fully flexible solar cells, piezoelectric speaker, temperature detector, and 12V organic complementary FET circuits

Three key requirements for wearable healthcare and biomedicai devices are the mechanical flexibility, the wireless interface, and the energy autonomy, because unobtrusive and maintenance-free devices are needed for the constant monitoring of vital human health data. Previously reported flexible healthcare and biomedicai devices, however, requires wired connection [1,2] or wireless power transmission [3,4]. A flexible energy autonomous healthcare device with a wireless interface, a fever alarm armband (FAA) integrating fully flexible solar cells, a piezoelectric speaker, a temperature detector, and 12V organic complementary FET (CFET) circuits is presented here. The system is also noteworthy for sound generation, with organic circuits driving the speaker.