A new class of organic–inorganic single and double hybrid perovskites with a diammonium-halide-diammonium spacer layer
Literature Information
Walter P. D. Wong, Xinyun Wang
Hybrid organic–inorganic perovskites (HOIPs) can be molecularly engineered to exhibit diverse functionalities such as chirality, ferroelectricity and photovoltaics. To date, research on layered HOIPs has mostly focused on Ruddlesden–Popper (RP) or Dion–Jacobson (DJ) type structural motifs. From the viewpoint of synthetic chemistry, it is interesting to explore structural motifs beyond these well-studied classes using rational synthetic routes. Here we report the synthesis of a new family of layered HOIPs named diammonium-halide-diammonium (DHD) perovskites. A DHD perovskite is distinguished by its organic ‘spacer’ layer consisting of diammonium-halide-diammonium. Based on the DHD perovskite family, we have successfully synthesized the elusive iodide-based lead-free double perovskite systems. We present the key chemical and structural design considerations for Cu+/Bi3+ and Ag+/Bi3+ DHD double perovskite systems, using 3-aminopyrrolidinium (3AP) and ethylenediammonium (ED) as the organic A-site cation. Finally, ferroelectricity can be achieved by introducing chiral 3-aminopyrroline cations into the crystal structure, which demonstrates the structure flexibility and potential applications of this new class of perovskites.
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Journal of Materials Chemistry A

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment










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