Nanocrystals (NCs) of perovskite materials have recently attracted great research interest because of their outstanding properties for optoelectronic applications, as evidenced by the increasing number of publications on laboratory scale devices. However, in order to achieve the commercial realisation of these devices, an in-depth understanding of the charge dynamics and photo-physics in these novel materials is required. These dynamics are affected by material composition but also by their size and morphology due to quantum confinement effects. Advances in synthesis methods have allowed nanostructures to be produced with enhanced confinement and structural stability, enhancing the efficiency of energy funnelling and radiative recombination and so resulting in more efficient light emitting devices. In addition, photovoltaics could greatly benefit from the exploitation of these materials not only through their deployment in tandem cell architectures but from the use of multiple exciton generation in these NCs. These systems also offer the opportunity to study quantum effects relating to interactions of excited states within and between NCs. Properties and behaviour that includes an enhanced Rashba effect, superfluorescence, polariton lasing, Rydberg exciton polariton condensates, and antibunched single photon emission have been observed in a single metal halide perovskite NC. The further study of these in NC systems will shed new light on the fundamental nature of their excited states, their control and exploitation. In this perspective, we give an overview of these effects and provide an outlook for the future of perovskite NCs and their devices.

钙钛矿材料的纳米晶体 (NCs) 最近引起了极大的研究兴趣，因为它们在光电应用方面具有出色的性能，越来越多的关于实验室规模器件的出版物证明了这一点。然而，为了实现这些器件的商业化实现，需要深入了解这些新型材料中的电荷动力学和光物理学。由于量子限制效应，这些动力学受材料成分的影响，但也受其尺寸和形态的影响。合成方法的进步使纳米结构的生产具有增强的限制和结构稳定性，提高了能量漏斗和辐射复合的效率，从而产生了更高效的发光器件。此外，光伏可以极大地受益于这些材料的开发，不仅通过它们在串联电池架构中的部署，而且通过在这些 NC 中使用多个激子产生。这些系统还提供了研究与 NC 内部和之间的激发态相互作用相关的量子效应的机会。在单个金属卤化物钙钛矿 NC 中观察到了包括增强的 Rashba 效应、超荧光、极化子激光、里德堡激子极化子凝聚物和反聚束单光子发射在内的特性和行为。对这些在 NC 系统中的进一步研究将揭示它们激发态的基本性质、它们的控制和利用。从这个角度来看，我们概述了这些影响，并展望了钙钛矿 NC 及其器件的未来。