Solid-State Ionic Rectification in Perovskite Nanowire Heterostructures

• DOI: 10.1021/acs.nanolett.0c03204
• Publication Date: 2020-10-14T20:08:45Z
• Authors: Qiao Kong; Amael Obliger; Minliang Lai; Mengyu Gao; David T. Limmer; Peidong Yang
• Keywords: vacancy-driven ion migration and interdiffusion; FOS: Physical sciences; Applied Physics (physics.app-ph); 02 engineering and technology; 530; Physical Chemistry; 01 natural sciences; solid-state ionic rectification; Affordable and Clean Energy; anion exchange; Physics - Chemical Physics; Nanoscience & Nanotechnology; Chemical Physics (physics.chem-ph); Condensed Matter - Materials Science; MSD-PChem; Materials Science (cond-mat.mtrl-sci); halide perovskite; Physics - Applied Physics; 540; 0104 chemical sciences; MSD-General; Chemical Sciences; nanowire heterostructure; 0210 nano-technology

Halide perovskites have attracted increasing research attention with regard to their potential for optoelectronic applications. Because of its low activation energy, ion migration is implicated in the long-term stability and many unusual transport behaviors halide perovskite devices. However, direct observation precise control ionic crystals remain challenging. Here, we designed an axial CsPbBr3–CsPbCl3 nanowire heterostructure, which electric-field-induced was clearly visualized quantified. We demonstrated that dependent on applied electric field exhibits rectification this solid-state system, due nonuniform distribution vacancies results from a competition between electrical screening creation/destruction at electrodes' interfaces. The asymmetric heterostructure characteristics add additional knob movement design advanced circuits as building blocks.