Perovtronics Research Center, Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, South Korea.
Chem Soc Rev. 2019 Apr 1;48(7):2011-2038. doi: 10.1039/c8cs00656c.
Over the last several years, inorganic-organic hybrid perovskites have shown dramatic achievements in photovoltaic performance and device stability. Despite the significant progress in photovoltaic application, an in-depth understanding of the fundamentals of precursor solution chemistry is still lacking. In this review, the fundamental background knowledge of nucleation and crystal growth processes in solution including the LaMer model and Ostwald ripening process is described. This review article also highlights the recent progress in precursor-coordinating molecule interaction in solution along with the role of anti-solvent in the solvent engineering process to control nucleation and crystal growth. Moreover, chemical pathways from precursor solution to perovskite film formation are given. This represents identification of the intermediate phase induced by precursor-coordinating molecule interaction and responsible intermediate species for uniform and dense perovskite film formation. Further to the description of chemical phenomena in solution, the contemporary progress in chemical precursor composition is also provided to comprehend the current research approaches to further enhance photovoltaic performance and device stability. On the basis of the critical and comprehensive review, we provide some perspectives to further achieve high-performance perovskite solar cells with long-term device stability through precisely controlled nucleation and crystal growth in precursor solution.
在过去的几年中，有机-无机杂化钙钛矿在光伏性能和器件稳定性方面取得了显著的进展。尽管在光伏应用方面取得了重大进展，但对前体溶液化学的基本原理仍缺乏深入的了解。在这篇综述中，描述了包括 LaMer 模型和奥斯特瓦尔德熟化过程在内的溶液成核和晶体生长过程的基本背景知识。本文还重点介绍了近年来前体-配位分子在溶液中的相互作用以及反溶剂在溶剂工程过程中控制成核和晶体生长的作用方面的最新进展。此外，还给出了从前驱体溶液到钙钛矿薄膜形成的化学途径。这代表了由前体-配位分子相互作用诱导的中间相的识别，以及对于形成均匀和致密钙钛矿薄膜的中间物种的识别。除了对溶液中化学现象的描述外，还提供了化学前体成分方面的当代进展，以了解进一步提高光伏性能和器件稳定性的当前研究方法。在对该主题进行批判性和全面综述的基础上，我们提出了一些观点，以通过在前驱体溶液中精确控制成核和晶体生长，进一步实现具有长期器件稳定性的高性能钙钛矿太阳能电池。
