National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
J Am Chem Soc. 2015 Apr 1;137(12):4158-63. doi: 10.1021/jacs.5b00290. Epub 2015 Mar 24.
Layered organic-inorganic hybrid perovskites that consist of metal halides and organic interlayers are a class of low-dimensional materials. Here, we report the fabrication of layered hybrid perovskites using metal halides and silsesquioxane with a cage-like structure. We used a silsesquioxane as an interlayer to produce a rigid structure and improve the functionality of perovskite layers. Propylammonium-functionalized silsesquioxane and metal halide salts (CuCl2, PdCl2, PbCl2, and MnCl2) were self-assembled to form rigid layered perovskite structures with high crystallinity. The rigid silsesquioxane structure produces micropores between the perovskite layers that can potentially be filled with different molecules to tune the dielectric constants of the interlayers. The obtained silsesquioxane-metal halide hybrid perovskites exhibit some characteristic properties of layered perovskites including magnetic ordering (CuCl4(2-) and MnCl4(2-)) and excitonic absorption/emission (PbCl4(2-)). Our results indicate that inserting silsesquioxane interlayers into hybrid perovskites retains and enhances the low-dimensional properties of the materials.
由金属卤化物和有机夹层组成的层状有机-无机杂化钙钛矿是一类低维材料。在这里，我们报告了使用金属卤化物和具有笼状结构的倍半硅氧烷来制造层状杂化钙钛矿。我们使用倍半硅氧烷作为夹层，以产生刚性结构并提高钙钛矿层的功能。丙基铵官能化的倍半硅氧烷和金属卤化物盐（CuCl2、PdCl2、PbCl2 和 MnCl2）自组装形成具有高结晶度的刚性层状钙钛矿结构。刚性的倍半硅氧烷结构在钙钛矿层之间产生微孔，这些微孔可以填充不同的分子，以调节层间的介电常数。所获得的倍半硅氧烷-金属卤化物杂化钙钛矿表现出一些层状钙钛矿的特征性质，包括磁有序（CuCl4(2-)和 MnCl4(2-)）和激子吸收/发射（PbCl4(2-)）。我们的结果表明，将倍半硅氧烷夹层插入杂化钙钛矿中保留并增强了材料的低维性质。
