Rowland Institute at Harvard University , Cambridge, Massachusetts 02142, United States.
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science , Suzhou 215163, P. R. China.
ACS Appl Mater Interfaces. 2017 Jun 7;9(22):18417-18422. doi: 10.1021/acsami.7b03445. Epub 2017 May 25.
Lead halide perovskites have emerged as low-cost, high-performance optical and optoelectronic materials, however, their material stability has been a limiting factor for broad applications. Here, we demonstrate stable core-shell colloidal perovskite nanocrystals using a novel, facile and low-cost copolymer templated synthesis approach. The block copolymer serves as a confined nanoreactor during perovskite crystallization and passivates the perovskite surface by forming a multidentate capping shell, thus significantly improving its photostability in polar solvents. Meanwhile, the polymer nanoshell provides an additional layer for further surface modifications, paving the way to functional nanodevices that can be self-assembled or lithographically defined.
卤铅钙钛矿作为一种低成本、高性能的光学和光电材料已经崭露头角，然而，其材料稳定性一直是广泛应用的一个限制因素。在这里，我们采用一种新颖、简便且低成本的嵌段共聚物模板合成方法，展示了稳定的核壳胶体钙钛矿纳米晶。该嵌段共聚物在钙钛矿结晶过程中充当受限纳米反应器，并通过形成多齿帽壳来钝化钙钛矿表面，从而显著提高其在极性溶剂中的光稳定性。同时，聚合物纳米壳提供了进一步表面修饰的额外层，为可以自组装或光刻定义的功能纳米器件铺平了道路。
