Methylammonium Polyiodides: Remarkable Phase Diversity of the Simplest and Low-Melting Alkylammonium Polyiodide System.

Clicks: 340
ID: 47673
2019
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Abstract
Newly discovered methylammonium polyiodides (MAI) are unique precursors for innovative solvent-free technologies in perovskite photovoltaics because MAI are liquids at room temperature and demonstrate high chemical reactivity. We investigated the features of an MAI-I system and built up a first phase diagram in wide temperature and composition ranges using data from differential scanning calorimetry, single-crystal X-ray diffraction, and visual thermal analysis. The phase diagram has been found to differ drastically from that of any related systems owing to the unique propensity of methylammonium toward forming a diversity of polyiodides with complicated crystal structures, namely, MAI, MAI, MAI, and MAI, found in this system for the first time. The performed density functional theory calculations revealed the crucial role of entropy contributing to the formation of higher methylammonium polyiodides, in good agreement with experimental data.
Reference Key
petrov2019methylammoniumthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Petrov, Andrey A;Fateev, Sergey A;Zubavichus, Yan V;Dorovatovskii, Pavel V;Khrustalev, Victor N;Zvereva, Irina A;Petrov, Andrey V;Goodilin, Eugene A;Tarasov, Alexey B;
Journal The journal of physical chemistry letters
Year 2019
DOI
10.1021/acs.jpclett.9b02360
URL
Keywords
energy storage materials characterization solid state physics

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