The surface of halide perovskites from nano to bulk
The surface of halide perovskites from nano to bulk
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DOI：
10.1038/s41578-020-0221-1
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发表时间：
2020-07
影响因子：
83.5
通讯作者：
Jingjing Xue;Rui Wang;Yang Yang-Yang
中科院分区：
文献类型：
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作者：
Jingjing Xue;Rui Wang;Yang Yang-Yang
半导体的表面通常在决定其性能方面起着关键作用。对于金属卤化物钙钛矿，了解其表面特征及其对材料和器件的影响变得越来越重要。在长度尺度下降到纳米级范围时，由于高的表面积与体积比，表面特征在调节钙钛矿材料的性质方面变得占主导地位。对于微米范围内的钙钛矿体膜，缺陷和结构无序容易在表面形成并影响器件性能。通过共同努力优化加工技术，现在可以用单层状多晶晶粒甚至单晶来制造高质量的钙钛矿薄膜。因此，表面缺陷仍然是进展的主要障碍，将表面研究推向了钙钛矿研究的最前沿。在这篇综述中，我们总结和评估了钙钛矿表面的理解和表面策略，以改善钙钛矿材料和钙钛矿器件的效率和稳定性的最新进展。
The surface of a semiconductor often has a key role in determining its properties. For metal halide perovskites, understanding the surface features and their impact on the materials and devices is becoming increasingly important. At length scales down to the nanoscale regime, surface features become dominant in regulating the properties of perovskite materials, owing to the high surface-to-volume ratio. For perovskite bulk films in the micrometre range, defects and structural disorder readily form at the surface and affect device performance. Through concerted efforts to optimize processing techniques, high-quality perovskite thin films can now be fabricated with monolayer-like polycrystalline grains or even single crystals. Surface defects therefore remain the major obstacle to progress, pushing surface studies to the forefront of perovskite research. In this Review, we summarize and assess recent advances in the understanding of perovskite surfaces and surface strategies towards improving perovskite materials and the efficiency and stability of perovskite devices.