# The preface: physical properties and functional behaviours of metal halide perovskites and their derivatives

## TL;DR

This paper explores the physical properties and functions of metal halide perovskites and their derivatives.

## Contribution

It presents a compilation of expert research on 3D, 2D halide perovskites, and organic-inorganic metal halides.

## Key findings

- Examines physical properties of 3D halide perovskites.
- Investigates novel functionalities of 2D halide perovskites.
- Analyzes behaviors of organic-inorganic metal halides.

## Abstract

This special issue brings together contributions from leading experts to explore the physical properties and novel functionalities of 3D halide perovskites, 2D halide perovskites, and organic-inorganic metal halides.