Preparation and Crystal Growth of Transition Metal Dichalcogenides

Abstract

Dichalcogenides are known from almost all transition metals. The representatives of this class of compounds show a number of interesting physical and chemical properties depending on their constituent transition metal and crystal structure, which makes them interesting for basic studies and applications in high‐end electronics, spintronics, optoelectronics, energy storage, flexible electronics, DNA sequencing and personalized medicine to this day. Many of these properties and effects can only be investigated on chemically and crystallographically pure samples ‐ usually on single crystals. The vast majority of these compounds can be crystallized using chemical vapour transport. However crystallization from the melt is also possible in a considerable number of compounds, including the frequently used self‐flux technique. For several compounds the crystallization from different solvents or solvent mixtures by means of solvothermal or hydrothermal synthesis is described.

NbSe2 Crystals Growth by Bromine Transport

“…Chemical transport rates with iodine are low; however, transport with bromine is more effective. Moreover, the addition of bromine led to WSe 2 crystals of better quality [14].…”