Investigation of Nitrogen Doped Barium Zirconate Using Density Functional Theory

TL;DR

This study uses density functional theory to analyze nitrogen doping effects on barium zirconate's structural, electrical, and optical properties, revealing increased conductivity with nitrogen content and local structural changes.

Contribution

It provides new insights into nitrogen doping effects on BaZrO$_3$'s properties using advanced DFT methods, including detailed local structural analysis.

Findings

Nitrogen doping lowers energy barriers for ion migration.

Electrical conductivity increases with nitrogen content.

Significant local structural changes around oxygen sites.

Abstract

Using density functional theory (DFT), this work explores barium zirconate doped with nitrogen. In addition, we used density functional theory (DFT) to study the BaZrO$_3$'s electrical, optical, and structural properties, and we found that the BaZrO$_3$ has intrinsic vacancy defects by employing the supercell approach. Integrating testability into hardware devices is the goal of testing design, an approach to integrated circuit design that draws on density functional theory. This technology simplifies production testing and implementation. The study strategy incorporates the following methods: LSDA+U, Exchange Correlation Approximations, Hohenberg Kohn Theorem, and Local Spin Density Approximation. We tracked the evolution of barium zirconate's protonic, nitrogen ionic, and electronic conductivities using Density Functional Theory (DFT). We found low electrical conductivity despite the fact that nitrogen doping successfully lowered energy barriers for oxygen and proton ion migration. The conductivity of barium zirconate increased in proportion to the supercell's nitrogen content. Furthermore, we investigated the local arrangements of octahedral sites in Pm3m cubic frameworks and utilized Density Functional Theory to dope BaZrO$_3$. Nitrogen doping caused a lot of changes to oxygen sites, revealing three groups of oxygen atoms with different structural properties.