Researchers at Pennsylvania State University have developed a specialized solar cell engineered to harvest indoor ambient lighting. The hardware converts energy from standard LED bulbs into electricity to run low power household gadgets. The new design could eventually eliminate disposable batteries in devices like remote controls and smart home sensors.
Standard photovoltaic panels rely on full spectrum sunlight to generate power. Indoor rooms present a different problem because LED bulbs emit light across a much narrower wavelength. To capture this specific light, the engineering team customized a perovskite crystalline material by adjusting the balance of iodine and bromine. Testing showed that a 35% bromine mixture matched the artificial lighting spectrum best, yielding optimal power conversion efficiency.
Manufacturing the material also required a chemical change. The team swapped out chlorobenzene for dichlorobenzene during the film production phase. This swap created a smoother crystal structure with fewer microscopic flaws. To keep the cell from degrading under constant indoor lighting, researchers added a top layer of phenethylammonium bromide. During laboratory tests, the finished prototype maintained stable power generation for 240 hours under continuous high intensity exposure.
Self sustaining indoor hardware is the main target for this research. If the technology scales up to commercial production, these indoor cells could power smart thermostats, fitness wearables, environmental monitors, and television remotes without requiring battery replacements. The discovery marks a practical shift toward capturing wasted indoor lighting for everyday electronic devices.
