One-step recycling recovers lead and valuable metals from perovskite solar cells
Researchers have developed a novel one-step recycling method capable of recovering toxic lead and valuable metals like gold and indium from flexible perovskite solar cells, paving the way for a circular economy in next-generation solar technology.
A team of researchers from Kanazawa University has introduced a groundbreaking one-step recycling process designed to recover toxic lead (Pb) and valuable metals, including gold (Au) and indium (In), from flexible perovskite solar cells (PSCs). This development aims to support the sustainable commercialization of these emerging solar technologies by addressing the challenges associated with end-of-life devices.
Perovskite solar cells are gaining attention for their high efficiency, lightweight nature, flexibility, and potential for low-cost manufacturing, making them suitable for diverse applications from wearables to building-integrated photovoltaics. However, their reliance on lead, a toxic element, necessitates effective recycling strategies to mitigate environmental risks. Furthermore, PSCs contain precious metals such as gold and indium, which are critical resources.
The newly developed method combines low-concentration acid treatment with selective adsorption and separation processes. This approach efficiently extracts toxic lead alongside valuable metals from discarded PSCs and modules. The researchers report high recovery efficiencies, achieving 99.7% for lead, 91.6% for gold, and 100% for indium from solution.
This recycling technique is compatible with both fresh and degraded devices and is designed to minimize the generation of secondary waste. The researchers believe this process is suitable for future large-scale recycling applications. By integrating such efficient recycling systems with future PSC manufacturing, the aim is to reduce environmental hazards, conserve critical resources, and accelerate the widespread adoption of perovskite solar energy.
This research addresses a critical bottleneck for perovskite solar cells: their lead content and the need for resource recovery. Developing efficient, one-step recycling methods that capture both toxic elements and valuable materials is crucial for the long-term sustainability and commercial viability of this promising photovoltaic technology. Such advancements are vital for a circular economy in the renewable energy sector, reducing reliance on virgin materials and minimizing environmental impact.
Edited by the news editor with AI from the original report — please refer to the original source.