Researchers Clean up Toxic Perovskite Solar Panels to Bring Them Indoors

Key Takeaways

• Lead‑free perovskite panels reach 16.36% indoor efficiency
• Vapour‑based process eliminates toxic solvents and lead
• Manufacturing compatible with existing evaporation equipment
• Flexible, thin cells enable integration into consumer electronics
• Potential to replace coin‑cell batteries in IoT sensors

Pulse Analysis

Indoor photovoltaic (PV) technology has long lagged behind its outdoor counterpart because conventional silicon cells deliver only about 10 % conversion under artificial lighting. Halide perovskites, with their tunable bandgaps, promise much higher efficiencies, but most formulations rely on lead and hazardous solvents, raising environmental and regulatory concerns. The University of Queensland team, led by Dr Miaoqiang Lyu and Prof Lianzhou Wang, announced a vapor‑based fabrication route that completely removes lead and toxic solvents, positioning the material for safer mass production.

The new process produces lead‑free perovskite films with fewer defect sites, enabling a record 16.36 % power‑conversion efficiency for indoor lighting conditions—a figure that surpasses previous lead‑free reports and approaches the performance of lead‑based counterparts. Because the method relies on thermal evaporation, it can be integrated into existing roll‑to‑roll lines and deposited on flexible plastics, opening the door to lightweight, shape‑conformable panels. Researchers note that encapsulation against oxygen and moisture remains the final hurdle before commercial reliability can be demonstrated.

If scaled, these panels could serve as direct power sources for low‑energy devices such as environmental sensors, wearables, and electronic shelf labels, potentially displacing billions of single‑use coin cells each year. Reducing battery waste aligns with circular‑economy goals and mitigates the risk of children’s exposure to small, ingestible batteries. Industry analysts expect pilot deployments within the next two to three years, prompting venture capital interest in perovskite‑based energy‑harvesting startups and prompting larger manufacturers to explore hybrid product lines.