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Thursday, October 03, 2019

Long Term Photovoltaic Sensors Power RFID

Impressive, if exposed to light, could power RFID chips for years.

Photovoltaic-Powered Sensors for the Internet of Things
MIT News
Rob Matheson

Massachusetts Institute of Technology (MIT) researchers have developed photovoltaic-powered sensors that could potentially transmit data for years before they need to be replaced, making them useful for Internet of things devices like sensors that gather real-time data about infrastructure and the environment. The researchers mounted thin-film perovskite cells as energy-harvesters on inexpensive radio-frequency identification (RFID) tags. The researchers found that the solar power produced by the cells gives the sensors a significant boost that enables greater data transmission distances and the ability to integrate multiple sensors onto a single RFID tag. The researchers used the sensors to continuously monitor indoor and outdoor temperatures over several days. The devices transmitted data continuously at distances five times greater than traditional RFID tags. Said MIT researcher Ian Matthews, "Our next step is to integrate these same technologies using printed electronics methods, potentially enabling extremely low-cost manufacturing of wireless sensors." .. '


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