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Review on Recent Progress of All-Inorganic Metal Halide Perovskites and Solar Cells

机译：全无机金属卤化物钙钛矿和太阳能电池的最新研究进展

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All-inorganic perovskites are considered to be one of the most appealing research hotspots in the field of perovskite photovoltaics in the past 3 years due to their superior thermal stability compared to their organic-inorganic hybrid counterparts. The power-conversion efficiency has reached 17.06% and the number of important publications is ever increasing. Here, the progress of inorganic perovskites is systematically highlighted, covering materials design, preparation of high-quality perovskite films, and avoidance of phase instabilities. Inorganic perovskites, nanocrystals, quantum dots, and lead-free compounds are discussed and the corresponding device performances are reviewed, which have been realized on both rigid and flexible substrates. Methods for stabilization of the cubic phase of low-bandgap inorganic perovskites are emphasized, which is a prerequisite for highly efficient and stable solar cells. In addition, energy loss mechanisms both in the bulk of the perovskite and at the interfaces of perovskite and charge selective layers are unraveled. Reported approaches to reduce these charge-carrier recombination losses are summarized and complemented by methods proposed from our side. Finally, the potential of inorganic perovskites as stable absorbers is assessed, which opens up new perspectives toward the commercialization of inorganic perovskite solar cells.
机译：在过去的三年中，由于全无机钙钛矿的热稳定性优于有机-无机杂化钙钛矿，因此被认为是钙钛矿光伏领域最吸引人的研究热点之一。功率转换效率已达到17.06％，重要出版物的数量不断增加。在这里，系统地强调了无机钙钛矿的研究进展，涉及材料设计，高质量钙钛矿薄膜的制备以及避免相不稳定性。讨论了无机钙钛矿，纳米晶体，量子点和无铅化合物，并综述了相应的器件性能，这些性能已在刚性和柔性衬底上实现。强调了稳定低带隙无机钙钛矿立方相的方法，这是高效稳定太阳能电池的先决条件。此外，钙钛矿主体中以及钙钛矿与电荷选择层的界面处的能量损失机理均未阐明。总结了减少这些电荷载流子复合损失的报道方法，并通过我方提出的方法进行了补充。最后，评估了无机钙钛矿作为稳定吸收剂的潜力，这为无机钙钛矿太阳能电池的商业化开辟了新的前景。

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