A 0D Lead-Free Hybrid Crystal with Ultralow Thermal Conductivity

Mohammed Haque, Appala Gandi, Rajeshkumar Mohanraman, Yakui Weng, Bambar Davaasuren, Abdul-Hamid M. Emwas, Craig Combe, Derya Baran, Alexander Rothenberger, Udo Schwingenschlögl, Husam N. Alshareef, Shuai Dong, Tom Wu

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Organic–inorganic hybrid materials are of significant interest owing to their diverse applications ranging from photovoltaics and electronics to catalysis. Control over the organic and inorganic components offers flexibility through tuning their chemical and physical properties. Herein, it is reported that a new organic–inorganic hybrid, [Mn(C2H6OS)6]I4, with linear tetraiodide anions exhibit an ultralow thermal conductivity of 0.15 ± 0.01 W m−1 K−1 at room temperature, which is among the lowest values reported for organic–inorganic hybrid materials. Interestingly, the hybrid compound has a unique 0D structure, which extends into 3D supramolecular frameworks through nonclassical hydrogen bonding. Phonon band structure calculations reveal that low group velocities and localization of vibrational energy underlie the observed ultralow thermal conductivity, which could serve as a general principle to design novel thermal management materials.
Original languageEnglish (US)
Pages (from-to)1809166
JournalAdvanced Functional Materials
Volume29
Issue number13
DOIs
StatePublished - Feb 7 2019

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