Yao Fang, Peng Jiali, Li Ruiming, Li Wenjing, Gui Pengbin, Li Borui, Liu Chang, Tao Chen, Lin Qianqian, Fang Guojia
Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, 430072, Wuhan, PR China.
Nat Commun. 2020 Mar 4;11(1):1194. doi: 10.1038/s41467-020-15037-x.
Large single crystals serve as an ideal platform for investigating intrinsic material properties and optoelectronic applications. Here we develop a method, namely, room-temperature liquid diffused separation induced crystallization that uses silicone oil to separate the solvent from the perovskite precursors, to grow high-quality perovskite single crystals. The growth kinetics of perovskite single crystals using this method is elucidated, and their structural and optoelectronic properties are carefully characterized. The resultant perovskite single crystals, taking CHNHPbBr as an example, exhibit approximately 1 µs lifetime, a low trap density of 4.4 × 10 cm, and high yield of 92%, which are appealing for visible light or X-ray detection. We hope our findings will be of great significance for the continued advancement of high-quality perovskite single crystals, through a better understanding of growth mechanisms and their deployment in various optoelectronics. The diffused separation induced crystallization strategy presents a major step forward for advancing the field on perovskite single crystals.
大尺寸单晶是研究材料本征特性和光电子应用的理想平台。在此，我们开发了一种方法，即室温液体扩散分离诱导结晶法，该方法利用硅油将溶剂与钙钛矿前驱体分离，以生长高质量的钙钛矿单晶。阐明了使用该方法生长钙钛矿单晶的动力学，并对其结构和光电子特性进行了仔细表征。以CHNHPbBr为例，所得钙钛矿单晶的寿命约为1微秒，陷阱密度低至4.4×10厘米，产率高达92%，这对于可见光或X射线探测具有吸引力。我们希望我们的发现将通过更好地理解生长机制及其在各种光电子学中的应用，对高质量钙钛矿单晶的持续发展具有重要意义。扩散分离诱导结晶策略是推进钙钛矿单晶领域的重要一步。
