Photovoltaic-powered sensors for the ‘Internet of Things’

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MIT researchers have designed low-cost, photovoltaic-powered sensors on RFID tags that work in sunlight and dimmer indoor lighting, and can transmit data for years before needing replacement. Credit: MIT News

By 2025, experts estimate the number of Internet of Things devices—including sensors that gather real-time data about infrastructure and the environment—could rise to 75 billion worldwide. As it stands, however, those sensors require batteries that must be replaced frequently, which can be problematic for long-term monitoring.

MIT researchers have designed photovoltaic-powered sensors that could potentially transmit data for years before they need to be replaced. To do so, they mounted thin-film perovskite cells—known for their potential low cost, flexibility, and relative ease of fabrication—as energy-harvesters on inexpensive radio-frequency identification (RFID) tags.

The cells could power the sensors in both bright sunlight and dimmer indoor conditions. Moreover, the team found the solar power actually gives the sensors a major power boost that enables greater data-transmission distances and the ability to integrate multiple sensors onto a single RFID tag.

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Nanocrystal ‘factory’ could revolutionize quantum dot manufacturing

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A new system for synthesizing quantum dots across the entire spectrum of visible light drastically reduces manufacturing costs, can be tuned on demand to any color and allows for real-time process monitoring to ensure quality control.

NC State researchers have developed a microfluidic system for synthesizing perovskite quantum dots that drastically reduces manufacturing costs, can be tuned on demand to any color and allows for real-time process monitoring to ensure quality control.

North Carolina State University researchers have developed a microfluidic system for synthesizing perovskite quantum dots across the entire spectrum of visible light. The system drastically reduces manufacturing costs, can be tuned on demand to any color and allows for real-time process monitoring to ensure quality control.

Continue reading… “Nanocrystal ‘factory’ could revolutionize quantum dot manufacturing”