Sensors that are charged via photovoltaics were developed by a group of MIT researchers. Such sensors could provide a solution for all those devices that are believed to form the basis of the so-called “Internet of Things”: By 2025, more than 75 billion devices of all kinds are expected to be connected to the network, mostly sensors to collect and transmit data.
One of the problems with sensors of this type is precisely the battery: it needs to be recharged regularly for the sensor to work, and this is certainly not good news, especially for sensors that need to work in the long term, such as environmental monitoring sensors, to name just one example.
According to the press release, which presents the two studies published in Advanced Functional Materials and IEEE Sensors Journal, these sensors can work for years and then transfer data before they can be exchanged. The cells are made of perovskite and form a thin film.
These are inexpensive, flexible and easy to manage cells. So thin that they may even be mounted on RFID (Radio Frequency Identification) tags without their price becoming too high. This would significantly expand the range of applications of the same RFID tags and sensors, which could be installed virtually anywhere where there is some light. In addition, these Perovskite-based cells may also collect and use indoor light, as stated by Ian Mathews, one of the authors of the study.
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