TY - JOUR
T1 - Organic–Inorganic Hybrid Gold Halide Perovskites
T2 - Structural Diversity through Cation Size
AU - Murasugi, Hideaki
AU - Kumagai, Shohei
AU - Iguchi, Hiroaki
AU - Yamashita, Masahiro
AU - Takaishi, Shinya
N1 - Funding Information:
This work was partially supported by JSPS KAKENHI Grant(A) 26248015, Grant(C) 16K05713, a research grant from the institute for quantum chemical exploration (IQCE), a grant from the ASAHI glass foundation, and Tohoku University Molecule & Materials Synthesis Platform in the Nanotechnology Platform Project sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. M.Y. thanks the support by the 111 project (B18030) from China. We thank Prof. Brian K. Breedlove in Tohoku University for his kind help to prepare the manuscript. We also acknowledge Prof. Yasutaka Kitagawa in Osaka University for the discussion about computational evaluation of the volume of the organic cations.
Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/7/25
Y1 - 2019/7/25
N2 - 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 became larger.
AB - 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 became larger.
KW - charge transfer
KW - coordination chemistry
KW - mixed valence
KW - organic–inorganic perovskites
KW - solar cells
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U2 - 10.1002/chem.201901288
DO - 10.1002/chem.201901288
M3 - Article
C2 - 31095786
AN - SCOPUS:85068500315
SN - 0947-6539
VL - 25
SP - 9885
EP - 9891
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 42
ER -