期刊
INORGANIC CHEMISTRY
卷 56, 期 19, 页码 11552-11564出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.7b01204
关键词
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资金
- European Union through the FP7 (ERC Starting Grant NANOSOLID) [306733]
- Swiss Federal Commission for Technology and Innovation [18614.1 PFNM-NM]
Interest in hybrid organic inorganic lead halide compounds with perovskite-like two-dimensional crystal structures is growing due to the unique electronic and optoelectronic properties of these compounds. Herein, we demonstrate the synthesis, thermal and optical properties, and calculations of the electronic band structures for one-and two layer compounds comprising both cesium and guanidinium cations: Cs[C(NH2)(3)]PbI4 (I), Cs[C(NH2)(3)]PbBr4 (II), and Cs-2[C(NH2)(3)]Pb2Br7 (III). Compounds I and II exhibit intense photoluminescence at low temperatures, whereas compound III is emissive at room temperature. All of the obtained substances are stable in air and do not thermally decompose until 300 degrees C. Since Cs+ and C(NH2)(3)(+) are increasingly utilized in precursor solutions for depositing polycrystalline lead halide perovskite thin films for photovoltaics, exploring possible compounds within this compositional space is of high practical relevance to understanding the photophysics and atomistic chemical nature of such films.
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