Greener,Nonhalogenated Solvent Systems for Highly Efficient Perovskite Solar Cells |
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| Authors: | Mozhgan Yavari Mohammad Mazloum‐Ardakani Somayeh Gholipour Mohammad Mahdi Tavakoli Silver‐Hamill Turren‐Cruz Nima Taghavinia Michael Grätzel Anders Hagfeldt Michael Saliba |
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| Affiliation: | 1. Laboratory of Photomolecular Science, école Polytechnique Fédérale de Lausanne, CH‐, Lausanne, Switzerland;2. Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran;3. Department of Physics, Alzahra University, Tehran, Iran;4. Non‐Metallic Materials Research Department, Niroo Research Institute (NRI), Tehran, Iran;5. Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China;6. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran;7. Laboratory for Photonics and Interfaces, école Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;8. Benemérita Universidad Autónoma de Puebla. CIDS, Av. San Claudio y 18 Sur, Col. San Manuel, Ciudad Universitaria, Puebla, Pue, México;9. Department of Physics, Sharif University of Technology, Tehran, Iran;10. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran;11. Adolphe Merkle Institute, University of Fribourg, CH, Fribourg, Switzerland |
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| Abstract: | All current highest efficiency perovskite solar cells (PSCs) use highly toxic, halogenated solvents, such as chlorobenzene (CB) or toluene (TLN), in an antisolvent step or as solvent for the hole transporter material (HTM). A more environmentally friendly antisolvent is highly desirable for decreasing chronic health risk. Here, the efficacy of anisole (ANS), as a greener antisolvent for highest efficiency PSCs, is investigated. The fabrication inside and outside of the glovebox showing high power conversion efficiencies of 19.9% and 15.5%, respectively. Importantly, a fully nonhalogenated solvent system is demonstrated where ANS is used as both the antisolvent and the solvent for the HTM. With this, state‐of‐the‐art efficiencies close to 20.5%, the highest to date without using toxic CB or TLN, are reached. Through scanning electron microscopy, UV–vis, photoluminescence, and X‐ray diffraction, it is shown that ANS results in similar mixed‐ion perovskite films under glovebox atmosphere as CB and TLN. This underlines that ANS is indeed a viable green solvent system for PSCs and should urgently be adopted by labs and companies to avoid systematic health risks for researchers and employees. |
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| Keywords: | nonhalogenated solvents perovskite solar cells photovoltaic devices |
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