Thermal Stability Study of Transition Metal Perovskite Sulfides

Abstract

Transition metal perovskite chalcogenides, a class of materials with rich tunability in functionalities, are gaining increased attention as candidate materials for renewable energy applications. Perovskite oxides are considered excellent n-type thermoelectric materials. Compared to oxide counterparts, we expect the chalcogenides to possess more favorable thermoelectric properties such as lower lattice thermal conductivity and smaller band gap, making them promising material candidates for high temperature thermoelectrics. Thus, it is necessary to study the thermal properties of these materials in detail, especially thermal stability, to evaluate their potential. In this work, we report the synthesis and thermal stability study of five compounds, α-SrZrS${}_3$, β-SrZrS${}_3$, BaZrS${}_3$, Ba${}_2$ZrS${}_4$, and Ba${}_3$Zr${}_2$S${}_7$. These materials cover several structural types including distorted perovskite, needle-like, and Ruddlesden-Popper phases. Differential scanning calorimeter and thermo-gravimetric analysis measurements were performed up to 1200°C in air. Structural and chemical characterizations such as X-ray diffraction, Raman spectroscopy, and energy dispersive analytical X-ray spectroscopy were performed on all the samples before and after the heat treatment to understand the oxidation process. Our studies show that perovskite chalcogenides possess excellent thermal stability in air at least up to 600°C.

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References in corpus (5)

• Chalcogenide Perovskites- an Emerging Class of Ionic Semiconductors
• Band-Gap Control via Structural and Chemical Tuning of Transition Metal Perovskite Chalcogenides
• Ideal Bandgap in a 2D Ruddlesden-Popper Perovskite Chalcogenide for Single-junction Solar Cells
• The Structural Diversity of ABS3 Compounds with d0 Electronic Configuration for the B-cation
• Mid-wave and Long-wave IR Linear Dichroism in a Hexagonal Perovskite Chalcogenide

Cited by in corpus (9)

• Crystal growth and structural analysis of perovskite chalcogenide BaZrS${}_3$ and Ruddlesden-Popper phase Ba${}_3$Zr${}_2$S${}_7$
• Understanding the growth mechanism of BaZrS${}_3$ chalcogenide perovskite thin films from sulfurized oxide precursors
• Discovery of highly-polarizable semiconductors BaZrS3 and Ba3Zr2S7
• Ferroelectric Polarization in Antiferroelectric Chalcogenide Perovskite BaZrS3 Thin Film
• Quasi-epitaxial growth of BaTiS${}_3$ films
• BaZrS${}_{\text{3}}$ Lights Up: The Interplay of Electrons, Photons, and Phonons in Strongly Luminescent Single Crystals
• Origins of chalcogenide perovskite instability
• Electrical contacts for high performance optoelectronic devices of BaZrS3 single crystals
• Epitaxial Thin Films of a Chalcogenide Perovskite