Two-dimensional hybrid organic-inorganic lead halides perovskite-type compounds have attracted immense scientific interest due to their remarkable optoelectronic properties and tailorable crystal structures. In this work, we present a new layered hybrid lead halide, namely [CH(NH)][C(NH)]PbI, wherein puckered lead-iodide layers are separated by two small and stable organic cations: formamidinium, CH(NH), and guanidinium, C(NH). This perovskite is thermally stable up to 255 °C, exhibits room-temperature photoluminescence in the red region with a quantum yield of 3.5%, and is photoconductive. This study highlights a vast structural diversity that exists in the compositional space typically used in perovskite photovoltaics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5867663 | PMC |
| http://dx.doi.org/10.1021/jacs.8b00194 | DOI Listing |
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Guanidinium-Formamidinium Lead Iodide: A Layered Perovskite-Related Compound with Red Luminescence at Room Temperature.
J Am Chem Soc
March 2018
Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Bioscience , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland.
Two-dimensional hybrid organic-inorganic lead halides perovskite-type compounds have attracted immense scientific interest due to their remarkable optoelectronic properties and tailorable crystal structures. In this work, we present a new layered hybrid lead halide, namely [CH(NH)][C(NH)]PbI, wherein puckered lead-iodide layers are separated by two small and stable organic cations: formamidinium, CH(NH), and guanidinium, C(NH). This perovskite is thermally stable up to 255 °C, exhibits room-temperature photoluminescence in the red region with a quantum yield of 3.
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