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Lead-Doped Titanium-Oxo Clusters as Molecular Models of Perovskite-Type PbTiO3 and Electron-Transport Material in Solar Cells |
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| Authors: | Shuyu Zhou Congping Li Hao Fu Dr. Jing Cao Prof. Dr. Jian Zhang Prof. Dr. Lei Zhang |
| Affiliation: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002 Fuzhou, P.R. China School of Physical Science and Technology, ShanghaiTech University, Shanghai Advanced Research Institute, Chinese Academy of Sciences, University of the Chinese Academy of, Sciences, 201210 Shanghai, P.R. China These authors contributed equally to this work.;2. College of Chemistry and Chemical Engineering, Lanzhou University, 730000 Lanzhou, P.R. China These authors contributed equally to this work.;3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002 Fuzhou, P.R. China School of Physical Science and Technology, ShanghaiTech University, Shanghai Advanced Research Institute, Chinese Academy of Sciences, University of the Chinese Academy of, Sciences, 201210 Shanghai, P.R. China;4. College of Chemistry and Chemical Engineering, Lanzhou University, 730000 Lanzhou, P.R. China;5. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002 Fuzhou, P.R. China |
| Abstract: | In this work we have successfully prepared two lead-doped titanium-oxo clusters with core structures that resemble isolated perovskite PbTiO3 species. In the obtained highly symmetric Pb8Ti7-oxo cluster, the central TiO6 octahedra are orthogonally extended to adjacent octahedra through corner-sharing and the eight dopant lead ions form a cubic arrangement, making it the first molecular model of perovskite PbTiO3. Moreover, the clusters readily dissolved in chloroform and showed high solution stability, as confirmed by MALDI-TOF MS measurements. Based on such solution processability, they can be easily spin-coated to form homogeneous films, which were employed as electron-transport materials in perovskite solar cells to give an average power conversion efficiency of around 15 % and improved device stability. This newly developed bottom-up cluster assembly method provides an efficient approach to the construction of atomically precise models of perovskite metal oxides as well as potential molecular tools to extend their applications. |
| Keywords: | cluster compounds lead perovskites solar cells titanium |