The exciton binding energy (Eb) is a key parameter that governs the physics of many
optoelectronic devices. At their best, trustworthy and precise measurements of Eb challenge …

2D metal halide perovskites can show narrow and broad emission bands (BEs), and the
latter's origin is hotly debated. A widespread opinion assigns BEs to the recombination of …

The past decade has witnessed tremendous progress in metal halide perovskites,
particularly in lead (Pb) halide perovskites, because of their extraordinary performance in …

Introducing large organic cations to form reduced-dimensional (quasi-2D) perovskites has
proven to be effective in stabilizing three-dimensional perovskites. In this study, we …

Abstract 2D perovskites hold immense promise in optoelectronics due to their strongly
bound electron-hole pairs (ie, excitons). While exciton polaron from interplay between …

The optical response of 2D layered perovskites is composed of multiple equally‐spaced
spectral features, often interpreted as phonon replicas, separated by an energy Δ≃ 12− 40 …

Efficient warm white light emission is an ideal characteristic of single-component materials
for light-emitting applications. Although two-dimensional hybrid perovskites are promising …

Aside from band gap reduction, little is understood about the effect of the tin‐for‐lead
substitution on the fundamental optical and optoelectronic properties of metal halide …

The versatile potential of lead halide perovskites and two-dimensional materials is merged
in the Ruddlesden–Popper perovskites having outstanding optical properties. Here, the …

Abstract The class of Ruddlesden–Popper type (PEA) 2PbI4 perovskites comprises 2D
structures whose optical properties are determined by excitons with a large binding energy …