Layered perovskites can be a substitute for bulk perovskites that can solve the stability issues in devices. In this work, we demonstrate the synthesis of ultra-stable and highly luminescent mixed tin-lead quasi two-dimensional (2D) and nanowire perovskite structures by compositional engineering. Ligand assisted reprecipitation method under ambient conditions leads to the formation of low dimensional perovskite nanostructures. By varying lead to the tin ratio in the precursor solution, the dimensions of perovskites vary from three dimensional (3D) to quasi 2D and one-dimensional (1D). Multiple phases (a mixture of 2D quasi 2D and 1D) having different energy bandgaps lead to charge concentration at the excited state of phase having the lowest bandgap (3D) and subsequent funneling type of emission, hence result in high photoluminescence quantum yield.

层状钙钛矿可以替代块状钙钛矿，可以解决设备的稳定性问题。在这项工作中，我们演示了通过成分工程合成超稳定和高发光的混合锡铅准二维（2D）和纳米线钙钛矿结构。在环境条件下的配体辅助再沉淀法导致形成低维钙钛矿纳米结构。通过改变前驱体溶液中铅与锡的比例，钙钛矿的尺寸从三维（3D）到准2D和一维（1D）不等。具有不同能带隙的多相（2D准2D和1D的混合物）会导致带隙（3D）最低的相的激发态处的电荷集中，并随之产生漏斗形的发射，