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HeadlineENERGY

Indoor Light Harvesting Perovskite Battery IndoorSun Enters Mass Production: IoT Devices Bid Farewell to Battery Replacement

British photovoltaic company Oxford PV's IndoorSun perovskite battery achieves 45% light-to-electricity conversion efficiency under indoor low-light conditions, providing a permanent power solution for billions of IoT sensors.

Indoor Light Harvesting Perovskite Battery IndoorSun Enters Mass Production: IoT Devices Bid Farewell to Battery Replacement

On January 9, 2031, British photovoltaic company Oxford PV announced that its IndoorSun indoor perovskite photovoltaic battery has officially entered mass production. Specifically optimized for indoor low-light environments, the product achieves a photoelectric conversion efficiency of 45% under typical indoor lighting conditions of 200 lux — far exceeding the 10% efficiency of traditional amorphous silicon batteries.

IndoorSun's breakthrough lies in its innovative perovskite material formulation. By introducing a two-dimensional/three-dimensional hybrid perovskite structure, Oxford PV successfully tuned the material's bandgap to 1.7 electron volts, optimal for the indoor light spectrum, while significantly improving carrier collection efficiency under low-light conditions.

"More than 50 billion IoT devices worldwide rely on battery power," said Chris Case, CTO of Oxford PV. "Billions of batteries are discarded every year. IndoorSun can make these devices self-sufficient under indoor lighting, fundamentally eliminating the need for battery replacement."

IndoorSun's first customers include smart building sensor manufacturer EnOcean and medical device company Abbott. EnOcean plans to integrate IndoorSun into its wireless sensor nodes to achieve truly "zero-maintenance" smart building systems.

However, IndoorSun currently costs approximately $5 per watt — more than five times that of traditional solar cells. Oxford PV says that as production capacity scales up, costs are expected to drop to $2 per watt by the end of 2031.

Environmental organizations have welcomed IndoorSun, calling it a critical step in reducing IoT device battery waste. According to estimates, more than 30,000 tons of IoT batteries are sent to landfills in Europe alone each year.