Ma Lin, Yan Zhengguang, Zhou Xiaoyuan, Pi Yiqun, Du Yiping, Huang Jie, Wang Kaiwen, Wu Ke, Zhuang Chunqiang, Han Xiaodong
Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China.
Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing, China.
Nat Commun. 2021 Apr 1;12(1):2023. doi: 10.1038/s41467-021-22193-1.
Recently, there are significant progresses in the growth of organic-inorganic lead halide perovskite single crystals, however, due to their susceptible nucleation and growth mechanisms and solvent requirements, the efficient and generalized growth for these single crystals is still challenging. Here we report the work towards this target with a polymer-controlled nucleation process for the highly efficient growth of large-size high-quality simple ternary, mixed-cations and mixed-halide perovskite single crystals. Among them, the carrier lifetime of FAPbBr single crystals is largely improved to 10199 ns. Mixed MA/FAPbBr single crystals are synthesized. The crucial point in this process is suggested to be an appropriate coordinative interaction between polymer oxygen groups and Pb, greatly decreasing the nuclei concentrations by as much as 4 orders of magnitudes. This polymer-controlled route would help optimizing the solution-based OIHPs crystal growth and promoting applications of perovskite single crystals.
最近，有机-无机铅卤化物钙钛矿单晶的生长取得了重大进展，然而，由于其敏感的成核和生长机制以及对溶剂的要求，这些单晶的高效和通用生长仍然具有挑战性。在此，我们报告了通过聚合物控制成核过程实现大尺寸高质量简单三元、混合阳离子和混合卤化物钙钛矿单晶高效生长的相关工作。其中，FAPbBr单晶的载流子寿命大幅提高至10199 ns。合成了混合MA/FAPbBr单晶。该过程的关键在于聚合物氧基团与Pb之间适当的配位相互作用，可将核浓度大幅降低多达4个数量级。这种聚合物控制的途径将有助于优化基于溶液的有机-无机杂化钙钛矿晶体生长，并促进钙钛矿单晶的应用。
