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Excessive Iodine Enabled Ultrathin Inorganic Perovskite Growth at the Liquid-Air Interface |
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| Authors: | Jiaxiao Yuan Xiaomin Zhang Dawei Zhou Feixiang Ge Jingxian Zhong Sihan Zhao Zhenwei Ou Guixiang Zhan Xu Zhang Congzhou Li Jin Tang Qi Bai Junran Zhang Chao Zhu Ti Wang Longfei Ruan Chongqin Zhu Xuefen Song Wei Huang Lin Wang |
| Institution: | 1. School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials (IAM), Key Laboratory of Flexible Electronics (KLOFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, 211816 China
These authors contributed equally to this work.;2. School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials (IAM), Key Laboratory of Flexible Electronics (KLOFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, 211816 China;3. School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials (IAM), Key Laboratory of Flexible Electronics (KLOFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, 211816 China SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096 China;4. School of Physical and Mathematical Sciences, Nanjing Tech University (Nanjing Tech), Nanjing, 211816 China;5. School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072 China;6. College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing, 100875 China;7. SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096 China;8. School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials (IAM), Key Laboratory of Flexible Electronics (KLOFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, 211816 China Frontiers Science Center for Flexible Electronics (FSCFE), Key Laboratory of Flexible Electronics (KLOFE), Shaanxi Institute of Flexible Electronics (SIFE), Institute of Flexible Electronics (IFE), Northwestern Polytechnical University (NPU), Xi'an, 710072 China |
| Abstract: | The liquid-air interface offers a platform for the in-plane growth of free-standing materials. However, it is rarely used for inorganic perovskites and ultrathin non-layered perovskites. Herein the liquid-air interfacial synthesis of inorganic perovskite nanosheets (Cs3Bi2I9, Cs3Sb2I9) is achieved simply by drop-casting the precursor solution with only the addition of iodine. The products are inaccessible without iodine addition. The thickness and lateral size of these nanosheets can be adjusted through the iodine concentration. The high volatility of the iodine spontaneously drives precursors that normally stay in the liquid to the liquid-air interface. The iodine also repairs in situ iodine vacancies during perovskite growth, giving enhanced optical and optoelectronic properties. The liquid-air interfacial growth of ultrathin perovskites provides multi-degree-of-freedom for constructing perovskite-based heterostructures and devices at atomic scale. |
| Keywords: | Free-Standing Materials Inorganic Perovskite Interfacial Growth Liquid-Air Interface Ultrathin Nanosheets |