Work

The doping factor approach in solid state ionics

Year: 2025

Type: article

Abstract: The doping factor approach is a simple, sometimes a “back-of-the-envelope” method, to predict concentrations of native point defects upon doping with aliovalent dopants. The doping factor is the ratio between the concentration of quasi-free electrons in the doped state and their concentration in a reference state, typically the undoped state. In binary compounds, as long as the Boltzmann statistics hold, the neutrality equation becomes a polynomial equation for the doping factor. Once the doping factor is found, all the concentrations of the native point defects are readily determined. While other computational methods allow us to find those concentrations, it is healthy for the researcher to have such a simple tool for calculating the resulting new concentrations. Furthermore, this method might be the only one available in cases with small deviations from stoichiometry. The method is explained and demonstrated using a simple case of magnesium oxide.

Source: Solid State Ionics

DOI: 10.1016/j.ssi.2025.117068

Authors: Yoed Tsur, Rawan Halabi

Institution: Technion – Israel Institute of Technology

Language: English

Topic: Advancements in Solid Oxide Fuel Cells

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,560

Funder: PAZY Foundation