Jacky Even

TL;DR: Thin films of near-single-crystalline quality are produced, in which the crystallographic planes of the inorganic perovskite component have a strongly preferential out-of-plane alignment with respect to the contacts in planar solar cells to facilitate efficient charge transport.

TL;DR: In this paper, the authors show that the band gap of three-dimensional hybrid perovskites is dominated by a giant spin-orbit coupling (SOC) in the conduction-band (CB).

TL;DR: It is reported that, counterintuitive to classical quantum-confined systems where photogenerated electrons and holes are strongly bound by Coulomb interactions or excitons, the photophysics of thin films made of Ruddlesden-Popper perovskites with a thickness exceeding two perovkite-crystal units is dominated by lower-energy states associated with the local intrinsic electronic structure of the edges of the perovSKite layers.

TL;DR: Two new series of hybrid two-dimensional (2D) perovskites that adopt the Dion-Jacobson (DJ) structure type are presented, which are the first complete homologous series reported in halide perovkite chemistry.

TL;DR: It is shown that the slow photocurrent degradation in thin-film photovoltaic devices is due to the formation of light-activated meta-stable deep-level trap states, and the creation of small polaronic states involving localized cooperative lattice strain and molecular orientations emerges as a credible microscopic mechanism requiring further detailed studies.