Effects of hydrogen on the properties of SiC crystals grown by physical vapor transport: Thermodynamic considerations and experimental results

Electrical properties and deep levels spectra of bulk SiC crystals grown by hybrid physical–chemical vapor transport method

“…This is in agreement with the relative abundances of silicon and carbon vapor species calculated using formation enthalpies [7]. According to these calculations, the increased carbon transport is due to hydrogen interaction with graphite elements of the hot zone forming C 2 H 2 as the most abundant specie.…”

“…Two earlier publications described the effects of addition of hydrogen to the PVT growth ambient. Based on the equilibrium and thermodynamic calculations, Fanton et al [7] argued that the C/Si ratio should increase with the addition of hydrogen to the growth ambient due to the reaction of hydrogen with the graphite elements of the hot zone. This results in the formation of hydrocarbons, which provide an additional chemical transport route for carbon.…”

Thermodynamic Aspects of the Growth of SiC Single Crystals using the CF‐PVT Process

“…[17][18][19] Moreover, this C/Si ratio has influence on the doping control through the well-known "site competition" mechanism. [20] Due to this effect, Fanton et al [21] have recently demonstrated a reduced nitrogen incorporation in sublimation-grown crystals by working under a hydrogencontaining atmosphere. In this work, we have tested the influence of additional elements (H and Cl) on the typical PVT Si-C-Ar system, focusing on the value of the key parameter, the C/Si ratio in the gas phase.…”

Effects of Solutally Dominant Convection on Physical Vapor Transport for a Mixture of Hg2Br2and Br2under Microgravity Environments

“…Zotov et al [3] prepared dense La-Sr-Fe-Co oxgen transport membranes on metal supports deposited by low plasma spraying physical vapor deposition. Fanton et al [4] dealt with the effect of hydrogen on the properties of SiC crystals grown by the PVT in view of thermodynamic considerations and experimental results. They showed the level of boron contamination in all samples was not affected by the addition of hydrogen.…”

“…Even though the process of PVT is an important crystal growth process in applications for acousto-optic materials [1][2][3][4][5][6], until now a better and thorough understanding of convection is required as a basis on the ground for space experiments in the future. This motivation causes us to investigate effects of solutally dominant convection on PVT for a mixture of Hg 2 Br 2 and Br 2 under microgravity environments.…”