Sustainable lead management in halide perovskite solar cells

So Yeon Park, Ji-Sang Park, Byeong Jo Kim, Hyemin Lee, Aron Walsh, Kai Zhu, Dong Hoe Kim () and Hyun Suk Jung ()
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So Yeon Park: Sungkyunkwan University
Ji-Sang Park: Kyungpook National University
Byeong Jo Kim: Sungkyunkwan University
Hyemin Lee: Sejong University
Aron Walsh: Imperial College London
Kai Zhu: National Renewable Energy Laboratory
Dong Hoe Kim: Sejong University
Hyun Suk Jung: Sungkyunkwan University

Nature Sustainability, 2020, vol. 3, issue 12, 1044-1051

Abstract: Abstract Despite the rapid development of perovskite solar cells (PSCs) toward commercialization, the toxic lead (Pb) ions in PSCs pose a potential threat to the environment, health and safety. Managing Pb via recycling represents a promising approach to mitigating its toxicity. However, managing Pb from commonly used organic solvents has been challenging due to the lack of suitable Pb adsorbents. Here, we report a new adsorbent for both separation and recovery of Pb from PSC pollutants. The synthesized iron-incorporated hydroxyapatite possesses a strongly negatively charged surface that improves electrostatic interaction through surface-charge delocalization, thus leading to enhanced Pb adsorption. We demonstrate the feasibility of a complete Pb management process, including the purification of Pb-containing non-aqueous solvents below 15 parts per 109, a level compliant with the standards of the US Environmental Protection Agency, as well as recycling of 99.97% of Pb ions by forming lead iodide.

Date: 2020
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DOI: 10.1038/s41893-020-0586-6

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