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Crucial Role of Water in the Mechanosynthesis of CsPbI 3 and Other ABX 3 Halides
Author(s) -
Tsvetkov Dmitry,
Mazurin Maksim,
Ivanov Ivan,
Malyshkin Dmitry,
Sereda Vladimir,
Zuev Andrey
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202003067
Subject(s) - halide , ternary operation , chemistry , ionic bonding , kinetics , mechanosynthesis , inorganic chemistry , ternary numeral system , perovskite (structure) , abx test , phase (matter) , chemical engineering , organic chemistry , ion , physics , statistics , mathematics , quantum mechanics , computer science , engineering , programming language , ball mill
Mechanochemical synthesis of CsPbI 3 , as a model system for ABX 3 halides, was studied. Water was shown to strongly promote the kinetics of formation of CsPbI 3 from the CsI+PbI 2 mixture through increased mobility of the constituting ionic species. Since many binary and ternary halides are hygroscopic, it was concluded that the presence of small, uncontrollable and unintentional additions of water should often occur in both precursor mixtures and synthesized complex halides boosting the kinetics of formation of many, if not all, ternary organic–inorganic hybrid halides such as, for example, MAPbX 3 (X=Cl, Br, I). In addition, trace amounts of water should influence the transport characteristics of complex halides. Thus, the presence of water explains, at least partially, the huge scatter in both the reported mechanochemical reaction times necessary for obtaining single‐phase APbX 3 perovskite halides and the activation energies of ionic diffusion in APbX 3 .