Abstract This special issue explores the extraordinary luminescence properties of metal halide perovskites. Metal halide perovskites have emerged at the forefront of next-generation, thin-film semiconductors for photovoltaic and light-emitting applications. These materials exhibit remarkable optoelectronic properties such as long charge carrier diffusion lengths and high radiative emission efficiencies, which are unexpected for low-temperature, solution-processed semiconductors. Despite impressive technological advancements in device efficiency, a fundamental understanding of perovskite photophysics and photochemistry is still lagging behind. In particular, perovskites often suffer from unpredictable variations in non-radiative recombination and a range of complex dynamic phenomena that remain poorly understood. This issue contains 26 peer-reviewed papers focused on elucidating and further exploring the intricate relationship between luminescence properties and perovskite synthesis, material composition and structure. The issue traces fundamental structure-function relationships on a microscopic level, which serves as a platform to further understand the photophysical processes in composite heterostructures and devices.

中文翻译：

---

金属卤化物钙钛矿的彩色发光——从基础到应用

摘要 本期特刊探讨了金属卤化物钙钛矿非凡的发光特性。金属卤化物钙钛矿已经出现在用于光伏和发光应用的下一代薄膜半导体的前沿。这些材料表现出显着的光电特性，例如长电荷载流子扩散长度和高辐射发射效率，这对于低温、溶液处理的半导体来说是出乎意料的。尽管在器件效率方面取得了令人印象深刻的技术进步，但对钙钛矿光物理和光化学的基本理解仍然落后。特别是，钙钛矿经常遭受不可预测的非辐射复合变化和一系列仍然知之甚少的复杂动态现象。本期包含 26 篇同行评审论文，重点阐明和进一步探索发光特性与钙钛矿合成、材料成分和结构之间的复杂关系。该问题在微观层面追踪了基本的结构 - 功能关系，这是进一步了解复合异质结构和器件中的光物理过程的平台。