Fig. 1: Ultraflexible, self-powered photoplethysmogram sensor. | Nature Communications

Fig. 1: Ultraflexible, self-powered photoplethysmogram sensor.

From: Self-powered ultraflexible photonic skin for continuous bio-signal detection via air-operation-stable polymer light-emitting diodes

Fig. 1

a Schematic diagram of the ultraflexible, self-powered photoplethysmograpm (PPG) sensor on human hands. Ultraflexible organic photovoltaic (OPV) module generates electrical power from sunlight and drives polymer light-emitting diode (PLED) and organic photodiode (OPD). b Schematic diagram of the self-powered PPG sensor with PLED, OPD, and OPV module. c A photograph of the ultraflexible OPV module under one-sun illumination. Scale bar indicates 1 cm. d A top-view photograph of the ultraflexible, self-powered PPG sensor. Scale bar indicates 1 cm. e An electrical circuit of self-powered PPG sensor.

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