WebGrain boundaries (GBs) are inevitable defects in large-area MoS 2 samples but they play a key role in their properties, however, the influence of grain misorientation on thermal transport has largely remained unknown. WebApr 12, 2024 · Using first-principles density functional calculations, we investigate the structure and properties of previously unstudied grain boundaries (GBs) in the solar absorber material copper-zinc-tin-sulfide (CZTS).
Tailoring Electrical Transport Across Grain Boundaries in ... - Science
WebPolycrystalline perovskite solar cells show high power conversion efficiencies despite the presence of grain boundaries (GBs). The benign nature of GBs on the electronic properties and structural stability in metal-halide perovskites contradicts their propensity for point defect formation, a controversy that is far from being understood. Grain boundary sliding (GBS) is a material deformation mechanism where grains slide against each other. This occurs in polycrystalline material under external stress at high homologous temperature (above ~0.4 ) and low strain rate and is intertwined with creep. Homologous temperature describes the operating temperature relative to the melting temperature of the material. There are mai… notsmirks effects
Growth and Grain Boundaries in 2D Materials - PubMed
WebFeb 15, 2024 · For the latter, crystallographic features such as point defects, [15-17] dislocations, stacking faults, grain boundaries (GBs), [20-22] complex unit cells, [23-25] and rattling atoms [26, 27] have been demonstrated to reduce the thermal conductivity by enhancing phonon scattering or phonon softening. WebOct 26, 2024 · Grain boundaries (GBs) in metals usually increase electrical resistivity due to their distinct atomic arrangement compared to the grain interior. While the GB … Webunderstanding the movement of grain boundaries (GBs), and knowing how the packing geom-etry and GB migration is affected by the need to balance surface tensions (interface energies). The quantitative analysis of the process is much more difficult since it involves transport of several different species with different chemical driving forces. how to ship a piano cross country