Sustainability in Perovskite Solar Cells

Area of Science:

• Materials Science
• Environmental Science
• Renewable Energy

Background:

• Perovskite solar cells achieve high power conversion efficiencies, nearing 25.5% for single-junction devices.
• Commercial viability is hindered by concerns regarding lead-based active layer toxicity and device instability.

Purpose of the Study:

• To comprehensively review the environmental and toxicity challenges associated with perovskite solar cells throughout their life cycle.
• To identify areas for improvement beyond lead toxicity and instability for sustainable commercialization.

Main Methods:

• Life cycle analyses (LCAs) were conducted to assess upstream and downstream consequences.
• Toxicity assessments of perovskite materials, including lead and potential replacements like tin.
• Review of mitigation strategies such as encapsulation and recycling.

Main Results:

• Life cycle analyses reveal significant environmental impacts from high-temperature processes, organic solvent use, and material selection.
• Lead in perovskites, even in small quantities, poses toxicity risks; tin replacements may present different hazards.
• Encapsulation and recycling show promise in extending device life and preventing lead leakage.

Conclusions:

• Perovskite solar cell technology requires further development to address environmental and toxicity concerns for global adoption.
• Sustainable strategies, including material substitution, process optimization, and end-of-life management, are essential.
• Research should focus on developing truly clean and environmentally benign solar technologies.