Solution-processable semiconductor lasers have been a long-standing challenge for next-
generation displays, light sources, and communication technologies. Metal halide …

The unprecedented increase of the power conversion efficiency of metal‐halide perovskite
solar cells has significantly outpaced the understanding of their fundamental properties. One …

Conspectus The past few years have witnessed an exciting revival of the research interest in
two-dimensional (2D) lead halide perovskites. The renaissance is strongly motivated by the …

Optically inactive dark exciton states play an important role in light emission processes in
semiconductors because they provide an efficient nonradiative recombination channel …

The effective mass of charge carriers is a crucial parameter for the design of any
optoelectronic device. The estimated values of the effective mass of 2D halide perovskites …

Typically, bright excitons (XB) emit light in two-dimensional (2D) layered hybrid perovskites.
There are also dark excitons (XD), for which radiative recombination is spin-forbidden …

The fast-growing field of atomically thin semiconductors urges a new understanding of two-
dimensional excitons, which entirely determine their optical responses. Here, taking layered …

The family of 2D Ruddlesden–Popper perovskites is currently attracting great interest of the
scientific community as highly promising materials for energy harvesting and light emission …

High magnetic field spectroscopy has been performed on lead chloride-based perovskite, a
material that attracts significant interest for photovoltaic and photonic applications within the …

Applications of two-dimensional (2D) perovskites have significantly outpaced the
understanding of many fundamental aspects of their photophysics. The optical response of …