限域空间中钙钛矿单晶薄膜生长机理研究

he growth of high-quality halide perovskite single-crystal films plays a crucial role in improving the performance of halide perovskite optoelectronic devices. The space-confined method is a commonly used method to grow perovskite single-crystal films, but it is still difficult to obtain large-area chalcogenide single-crystal films due to the elusive growth mechanism. In this work, we will analyze the main factors affecting the nucleation and growth of CsPbBr3 single-crystal films in the space-confined method from the classical crystal growth theory. The use of a low surface energy growth substrate can help to reduce the nucleation rate of crystals and thus improve the quality and area of the grown single crystal films. In addition, the morphological changes of CsPbBr3 single crystalsGrowth mechanism for perovskite single-crystal thin film in space-confined condition during the growth process are also explored.