Applied Physical Sciences (United States)

Imperfections and their passivation in halide perovskite solar cells

Perovskite solar cells to date are made of polycrystalline films which contain a high density of defects. Imperfection passivation to reduce non-radiative recombination and supp...

Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells

Mapping perovskite trap states The high efficiency of hybrid inorganic-organic perovskite solar cells is mainly limited by defects that trap the charge carriers and lead to unpr...

High temperature superconductivity in the LiTiO ternary system

Surface tension, roughening, and lower critical dimension in the random-field Ising model

A continuum interface model is constructed to study the low-temperature properties of domain walls in the random-field Ising model (RFIM). The width of the domain wall and its s...

Superconductivity and magnetic order in ternary rare earth transition metal phosphides

Superconducting Phosphorus

Phosphorus, the element itself, becomes superconducting near 4.7°K and at pressures exceeding 100 kilobars. This constitutes one of the four last missing links in the proof that...