Bhardwaj Aditya, Marongiu Daniela, Demontis Valeria, Simbula Angelica, Quochi Francesco, Saba Michele, Mura Andrea, Bongiovanni Giovanni
Dipartimento di Fisica, Università degli Studi di Cagliari, I-09042 Monserrato, Italy.
Nanomaterials (Basel). 2024 Sep 4;14(17):1444. doi: 10.3390/nano14171444.
Sn-based halide perovskites are expected to be the best replacement for toxic lead-based counterparts, owing to their similar ionic radii and the optimal band gap for use in solar cells, as well as their versatile use in light-emitting diodes and photodetection applications. Concerns, however, exist about their stability under ambient conditions, an issue that is exacerbated in polycrystalline films because grain boundaries present large concentrations of defects and act as entrance points for oxygen and water, causing Sn oxidation. A current thriving research area in perovskite materials is the fabrication of perovskite single crystals, promising improved optoelectronic properties due to excellent uniformity, reduced defects, and the absence of grain boundaries. This review summarizes the most recent advances in the fabrication of single crystal Sn-based halide perovskites, with emphasis on synthesis methods, compositional engineering, and formation mechanisms, followed by a discussion of various challenges and appropriate strategies for improving their performance in optoelectronic applications.
基于锡的卤化物钙钛矿有望成为有毒的铅基钙钛矿的最佳替代品，这是由于它们具有相似的离子半径以及适用于太阳能电池的最佳带隙，并且在发光二极管和光电探测应用中用途广泛。然而，人们担心它们在环境条件下的稳定性，在多晶薄膜中这个问题会更加严重，因为晶界存在大量缺陷，并且是氧气和水的进入点，会导致锡氧化。钙钛矿材料当前一个蓬勃发展的研究领域是钙钛矿单晶的制备，由于具有优异的均匀性、减少的缺陷以及不存在晶界，有望改善光电性能。本综述总结了单晶锡基卤化物钙钛矿制备方面的最新进展，重点介绍了合成方法、成分工程和形成机制，随后讨论了各种挑战以及提高其在光电应用中性能的适当策略。
