Journal
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
Volume 48, Issue 7, Pages 830-833Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/10.930908
Keywords
implantable device; near-infrared light; photodiode; power supply; rechargeable battery
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A novel power supply for medical implants has been developed. A wireless near-infrared power transmission recharges a lithium secondary battery in the power supply. A photovoltaic cell array embedded under skin receives near-infrared light through the skin and charges the battery directly powering an implanted device. We have shown that, fur a photodiode area of 2.1 cm(2), 17 min of near-infrared irradiation at a 810-nm wavelength with a power density of 22 mW/cm(2) can send enough energy to allow regular commercial cardiac pacemakers: to run for 24 h. The temperature rise of the skin during the light irradiation was 1.4 degreesC.
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