Organic-Inorganic Hybrid Gold Halide Perovskites: Structural Diversity via Cation Size.

08:00 EDT 16th May 2019 | BioPortfolio

Summary of "Organic-Inorganic Hybrid Gold Halide Perovskites: Structural Diversity via Cation Size."

Crystal structures of a series of organic-inorganic hybrid gold iodide perovskites, formulated as A2[AuII2][AuIIII4](A = methylammonium (MA) (1) and formamidinium (FA) (2)), A'2[I3]1-x[AuII2]x[AuIIII4](A' = imidazolium (IMD) (3), guanidinium (GUA) (4), dimethylammonium (DMA) (5), pyridinium (PY) (6), and piperizinium (PIP) (7)), systematically changed depending on the cation size. In addition, triiodide (I3-) ions were partly incorporated into the AuI2- sites of 3-7, whereas they were not incorporated into those of 1 and 2. Such a difference comes from the size of the organic cation. Optical absorption spectra showed characteristic intervalence charge-transfer bands from AuI to AuIII species, and the optical band gap increased as the size of the cation become larger.


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Name: Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765


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