Haruta Yuki, Ye Hanyang, Huber Paul, Sandor Nicholas, Pavesic Junior Antoine, Dayneko Sergey, Qiu Shuang, Yeddu Vishal, Saidaminov Makhsud I
Department of Chemistry, University of Victoria, Victoria, British Columbia Canada.
Department of Electrical & Computer Engineering, University of Victoria, Victoria, British Columbia Canada.
Nat Synth. 2024;3(10):1212-1220. doi: 10.1038/s44160-024-00576-8. Epub 2024 Jun 18.
Controlling the linear growth rate, a critical factor that determines crystal quality, has been a challenge in solution-grown single crystals due to complex crystallization kinetics influenced by multiple parameters. Here we introduce a flux-regulated crystallization (FRC) method to directly monitor and feedback-control the linear growth rate, circumventing the need to control individual growth conditions. When applied to metal halide perovskites, the FRC maintains a stable linear growth rate for over 40 h in synthesizing CHNHPbBr and CsPbBr single crystals, achieving outstanding crystallinity (quantified by a full width at half-maximum of 15.3 arcsec in the X-ray rocking curve) in a centimetre-scale single crystal. The FRC is a reliable platform for synthesizing high-quality crystals essential for commercialization and systematically exploring crystallization conditions, maintaining a key parameter-the linear growth rate-constant, which enables a comprehensive understanding of the impact of other influencing factors.
控制线性生长速率是决定晶体质量的关键因素，由于受多个参数影响的复杂结晶动力学，溶液生长单晶一直面临挑战。在此，我们引入一种通量调节结晶（FRC）方法，以直接监测和反馈控制线性生长速率，无需控制各个生长条件。当应用于金属卤化物钙钛矿时，FRC在合成CHNHPbBr和CsPbBr单晶时，能在40多小时内保持稳定的线性生长速率，在厘米级单晶中实现了出色的结晶度（通过X射线摇摆曲线半高宽为15.3弧秒来量化）。FRC是一个可靠的平台，用于合成商业化所需的高质量晶体，并系统地探索结晶条件，保持关键参数——线性生长速率恒定，这有助于全面理解其他影响因素的作用。
