Chen Yameng, Liu Yongsheng, Hong Maochun
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
Nanoscale. 2020 Jun 21;12(23):12228-12248. doi: 10.1039/d0nr02922j. Epub 2020 Jun 8.
All-inorganic caesium lead halide perovskite nanocrystals (PeNCs) with different dimensionalities have recently fascinated the research community due to their extraordinary optoelectronic properties including tunable bandgaps over the entire visible spectral region, high photoluminescence quantum yields (PLQYs) close to unity and narrow emission line widths down to 10-20 nm, making them particularly suitable as promising candidates for numerous applications ranging from light-emitting diodes (LEDs), solar cells to scintillators. Despite the considerable progress made in the past six years, the real-world applications of caesium lead halide PeNCs themselves especially in the category of CsPbX (X = Cl, Br and I) are still restricted by their labile crystal lattices and downgraded luminescence when exposed to ambient air conditions. Recent experimental and theoretical studies on cation doping have proven to be an effective way to significantly improve the physicochemical properties of cesium lead halide PeNCs, which would have profound implications for a range of applications. In this review, we provide a brief overview of the most recent advances in cation-doped all-inorganic caesium lead halide PeNCs, aimed at developing high-performance and long-term stable optoelectronic and photovoltaic devices, which covers areas from their fundamental considerations of cation doping, controlled synthesis methodology and novel physicochemical properties to the optoelectronic applications with an emphasis on perovskite-based LEDs and solar cells. And finally, some possible directions of future efforts toward this active research field are also proposed.
近年来，具有不同维度的全无机铯铅卤化物钙钛矿纳米晶体（PeNCs）因其非凡的光电特性而引起了研究界的关注，这些特性包括在整个可见光谱区域内可调的带隙、接近1的高光致发光量子产率（PLQYs）以及低至10 - 20纳米的窄发射线宽，这使得它们特别适合作为从发光二极管（LED）、太阳能电池到闪烁体等众多应用的有前途的候选材料。尽管在过去六年中取得了相当大的进展，但铯铅卤化物PeNCs本身的实际应用，特别是CsPbX（X = Cl、Br和I）类别的应用，仍然受到其不稳定晶格以及暴露在环境空气条件下发光性能下降的限制。最近关于阳离子掺杂的实验和理论研究已被证明是显著改善铯铅卤化物PeNCs物理化学性质的有效方法，这对一系列应用具有深远影响。在这篇综述中，我们简要概述了阳离子掺杂的全无机铯铅卤化物PeNCs的最新进展，旨在开发高性能和长期稳定的光电器件和光伏器件，内容涵盖从阳离子掺杂的基本考虑、可控合成方法以及新颖的物理化学性质到光电器件应用，重点是基于钙钛矿的LED和太阳能电池。最后，还提出了针对这个活跃研究领域未来努力的一些可能方向。
