Hybrid Organic–Inorganic Lead Halide with Red Luminescence

  • Author: ChemistryViews.org
  • Published: 15 March 2018
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Journal of the American Chemical Society/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Hybrid Organic–Inorganic Lead Halide with Red Luminescence

Layered hybrid organic–inorganic lead halides are materials with perovskite-type structures, unique optoelectronic properties, and a range of possible applications. The exact structure of the material determines its optoelectronic properties.


Maksym V. Kovalenko, Swiss Federal Institute of Technology (ETH) Zurich, and Empa − Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, both Switzerland, and colleagues have synthesized a new layered hybrid lead halide. The team combined formamidinium acetate with guanidinium carbonate, lead acetate, and hydroiodic acid to create the desired GFAPbI4 material as needle-shaped crystals (G = guanidinium, pictured bottom right; FA = formamidinium, pictured top left).


The crystalline material is stable up to 225 °C and shows red luminescence with a quantum yield of 3.5 % at room temperature. It also is photoconductive, which means it has a higher electrical conductivity when irradiated than in the dark. According to the researchers, these results showcase the structural diversity that can be achieved with lead halide perovskites.


 

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