Metal halide perovskites (MHPs) are in a blossoming status where their inherent optoelectronic properties are being revisited from the perspective of both fundamental science and practical application. In an attempt to boost the manipulating photoluminescence performance of MHPs, it is timely and vital to review the relation between structural attributes and the photo-physical phenomena for their unique broad-band emissions. In this review, we highlight the luminescent mechanisms of MHPs from dopants, self-trapped excitons (STEs) and defects, and some progresses with an emphasis on how multi-color broad-band emitters can be designed in various classes of MHPs frameworks. We also summarize the integration of MHPs into optoelectronic devices including light-emitting diodes, X-ray scintillators, fluorescence sensors and thermometers. This review aims to provide an in-depth insights into the structure-luminescence relationships from mechanism, materials, and applications, and further pave a way to discuss the current challenges and future promising prospects in MHPs.

金属卤化物钙钛矿（MHP）处于蓬勃发展的状态，从基础科学和实际应用的角度出发，其固有的光电性能正在重新审视。为了提高MHP的操纵光致发光性能，对于其独特的宽带发射，审查结构属性和光物理现象之间的关系是及时且至关重要的。在这篇综述中，我们重点介绍了来自掺杂剂，自陷激子（STE）和缺陷的MHP的发光机理，并着重介绍了如何在各种MHP框架中设计多色宽带发射器的进展。我们还总结了将MHP集成到光电设备中的情况，这些设备包括发光二极管，X射线闪烁器，荧光传感器和温度计。