Selective dissolution of halide perovskites as a step towards recycling solar cells

Byeong Jo Kim, Dong Hoe Kim, Seung Lee Kwon, So Yeon Park, Zhen Li, Kai Zhu and Hyun Suk Jung ()
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Byeong Jo Kim: School of Advanced Materials Science and Engineering, Sungkyunkwan University
Dong Hoe Kim: Chemistry and Nanoscience Center, National Renewable Energy Laboratory
Seung Lee Kwon: School of Advanced Materials Science and Engineering, Sungkyunkwan University
So Yeon Park: School of Advanced Materials Science and Engineering, Sungkyunkwan University
Zhen Li: Chemistry and Nanoscience Center, National Renewable Energy Laboratory
Kai Zhu: Chemistry and Nanoscience Center, National Renewable Energy Laboratory
Hyun Suk Jung: School of Advanced Materials Science and Engineering, Sungkyunkwan University

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract Most research on perovskite solar cells has focused on improving power-conversion efficiency and stability. However, if one could refurbish perovskite solar cells, their stability might not be a critical issue. From the perspective of cost effectiveness, if failed, perovskite solar cells could be collected and recycled; reuse of their gold electrodes and transparent conducting glasses could reduce the price per watt of perovskite photovoltaic modules. Herein, we present a simple and effective method for removing the perovskite layer and reusing the mesoporous TiO2-coated transparent conducting glass substrate via selective dissolution. We find that the perovskite layer can be easily decomposed in polar aprotic solvents because of the reaction between polar aprotic solvents and Pb2+ cations. After 10 cycles of recycling, a mesoporous TiO2-coated transparent conducting glass substrate-based perovskite solar cell still shows a constant power-conversion efficiency, thereby demonstrating the possibility of recycling perovskite solar cells.

Date: 2016
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DOI: 10.1038/ncomms11735

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