Centre for Nanotechnology, Indian Institute of Technology Guwahati (IIT G), Guwahati, Assam, 781039, India.
Chemistry. 2023 Jan 24;29(5):e202202475. doi: 10.1002/chem.202202475. Epub 2022 Nov 29.
Recently emerged lead-halide perovskite nanocrystals (PNCs) are promising optoelectronic material due to their easy solution processability, wide range of color tunability, as well as very high photoluminescence quantum yield. Despite their significant success in lab-scale optoelectronic applications, the long-term stability becomes the main issue, hindering them towards commercialization. The highly ionic nature of such lead-halide structure makes them extremely unstable in water and air. But a very few groups have taken the advantage of such nature of the crystal structure for water-triggered chemical transformation towards shape, composition, and morphology controlled stable and bright PNCs, which are otherwise difficult to obtain by typical direct approach. Furthermore, using polymer as an encapsulating layer for the PNCs, water-soluble stable PNCs have been prepared. In this review, the recent progress on the water-hexane interface chemistry towards chemical transformation to produce several PNCs is described. Such method not only ensure to yield several shape-controlled perovskites nanocrystals, but also formation of perovskites in aqueous phase that show promising application towards bio-imaging.
最近出现的卤化铅钙钛矿纳米晶体（PNCs）由于其易于溶液处理、广泛的颜色可调性以及非常高的光致发光量子产率，是一种很有前途的光电材料。尽管它们在实验室规模的光电应用中取得了显著的成功，但长期稳定性成为主要问题，阻碍了它们的商业化。这种卤化铅结构的高度离子性质使得它们在水和空气中极其不稳定。但是，很少有研究小组利用晶体结构的这种性质，通过水触发的化学转化，来实现形状、组成和形貌可控的稳定且明亮的 PNCs，而通过典型的直接方法则很难获得这些 PNCs。此外，通过将聚合物用作 PNC 的封装层，已经制备了水溶性稳定的 PNCs。在这篇综述中，描述了在水-己烷界面化学方面的最新进展，以进行化学转化来制备几种 PNCs。这种方法不仅可以保证得到几种形状可控的钙钛矿纳米晶体，而且还可以在水相中形成钙钛矿，在生物成像方面具有广阔的应用前景。
