Hosun Lee

TL;DR: Ferroelectrics are dielectric materials that have spontaneous polarization in certain temperature range and show nonlinear polarization-electric field dependence called a hysteresis loop as discussed by the authors.

TL;DR: In this article, the authors identify the mechanisms that lead to the lowest energy structures for the stable and metastable (GST) compounds, namely, strain energy release by the formation of superlattice structures along of the hexagonal [0001] direction and by maximizing the number of Te atoms surrounded by three Ge and three Sb atoms (3Ge-Te-3Sb rule).

TL;DR: In this article, the optical properties and the band structures of pseudobinary compounds were studied experimentally and theoretically by using spectroscopic ellipsometry and density functional calculations, and the experimental critical-point energies of the compounds, especially GeTe, match well to those of theoretical calculation.

TL;DR: In this article, a kinetically controlled polycrystalline organic-shielded nanograin (OSN) film with a uniformly distributed organic semiconducting additive (2,2′, 2′′-(1,3,5-benzinetriyl)-tris(1-phenyl-1-Hbenzimidazole), TPBI) is developed mimicking core-shell nanoparticles.

TL;DR: A sheet resistance and optical transmittance-tunable amorphous ZnSnO3 (ZTO) multilayer electrode created through the insertion of a nano-scale Ag layer is demonstrated as an indium-free transparent conducting electrode for cost-efficient inverted organic solar cells (IOSCs) as discussed by the authors.