(CH3NH3)2PdCl4: A Compound with Two‐Dimensional Organic–Inorganic Layered Perovskite Structure |
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Authors: | Dr. Xuesong Yin Dr. Chunhua Tang Dr. Guojun Qi Prof. Hao Gong |
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Affiliation: | 1. Department of Materials Science and Engineering, National University of Singapore, Singapore;2. Singapore Institute of Manufacturing Technology (SIMTech), Singapore |
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Abstract: | The synthesis of previously unknown perovskite (CH3NH3)2PdCl4 is reported. Despite using an organic cation with the smallest possible alkyl group, a 2D organic–inorganic layered Pd‐based perovskites was still formed. This demonstrates that Pd‐based 2D perovskites can be obtained even if the size of the organic cation is below the size limit predicted by the Goldschmidt tolerance‐factor formula. The (CH3NH3)2PdCl4 phase has a bulk resistivity of 1.4 Ω cm, a direct optical gap of 2.22 eV, and an absorption coefficient on the order of 104 cm?1. XRD measurements suggest that the compound is moderately stable in air, an important advantage over several existing organic–inorganic perovskites that are prone to phase degradation problems when exposed to the atmosphere. Given the recent interest in organic–inorganic perovskites, the synthesis of this new Pd‐based organic–inorganic perovskite may be helpful in the preparation and understanding of other organic–inorganic perovskites. |
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Keywords: | layered compounds organic– inorganic hybrid composites palladium perovskite phases structure elucidation |
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