Publication date: 17th February 2025
Prior to commercialisation, perovskite solar cells must be designed for their end-of-life prioritising the recovery and reuse of materials, reduction of waste and avoiding the release of toxic chemicals to the environment in the process. Due to their ionic nature, perovskite films can be easily dissolved making the recovery and reuse of the energy-intensive substrates feasible, but this process generates a waste solution containing perovskite precursor ions (Pb2+, I- and other cations) that must be captured to avoid their release to the environment. In this work, we employ a cheap and commercially available strong-base anion-exchange resin to capture and eventually recover iodide ions from a precursor solution and implement ion chromatography to evaluate the resin capacity and the percentage of recovered iodide from the precursor solution. We then propose a mechanism where a combination of cation and anion exchange resins are employed to capture all the precursor ions from perovskite waste and eventually recover them as precursor salts and reuse them for perovskite solar cells fabrication in an easy-to-implement, low-environmental impact process with potential to be scaled-up.
The authors would like to thank the Swansea TATA Research and Innovation Prosperity Partnership for Printed Perovskite PV (STRIPS) project and the Engineering and Physical Sciences Research Council (EPSRC) for providing funding for the research and to attend this conference.
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