Self-Powered, Flexible Heart Monitor

Self-Powered, Flexible Heart Monitor
An ultra-flexible heart monitor powered by ambient light can wrap around a finger.

Developed by teams from Riken and the University of Tokyo, the cardiac monitor features the researchers’ ‘nano-grating surface,’ which can absorb light from many different angles. This innovative surface allows the device to achieve a photo-conversion efficiency of 10.5 percent, which is enough to power a tiny heart monitor and brings us closer to the 15 percent efficiency believed to make such organic photovoltaics market-competitive.

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