论文标题
钙钛矿纳米线异质结构中的固态离子矫正
Solid-state ionic rectification in perovskite nanowire heterostructures
论文作者
论文摘要
卤化物钙钛矿引起了人们对其出色的光电应用的越来越多的研究。由于其低活化能，离子迁移与长期稳定性和许多异常的运输行为有关。但是，卤化物钙钛矿晶体中离子运输的精确控制仍然具有挑战性。在这里，我们在轴向CSPBBR $ _3 $ -CSPBCL $ _3 $ nanowire异质结构中可视化和量化了电场引起的卤化物离子迁移，并证明了固态离子整个整流的整流，这是由于Nanowire的电源互动和竞争性的竞争和创建的竞争和竞争性的竞争和他们的创建和他们的创建和他们的创建和他们的创建而导致的。不对称的异质结构特性为带有卤化物钙钛矿的高级离子电路时的离子移动操作增加了一个额外的旋钮。
Halide perovskites have attracted increasing research attention regarding their outstanding optoelectronic applications. Owing to its low activation energy, ion migration is implicated in the long-term stability and many unusual transport behaviors of halide perovskite devices. However, precise control of the ionic transport in halide perovskite crystals remains challenging. Here we visualized and quantified the electric-field-induced halide ion migration in an axial CsPbBr$_3$-CsPbCl$_3$ nanowire heterostructure and demonstrated a solid-state ionic rectification, which is due to the non-uniform distribution of the ionic vacancies in the nanowire that results from a competition between electrical screening and their creation and destruction at the electrode interface. The asymmetric heterostructure characteristics add an additional knob to the ion-movement manipulation in the design of advanced ionic circuits with halide perovskites as building blocks.
