Some Aspects of Defect Chemistry in P-Type Perovskite Conductors

Author

Xiao Dong Zhou
Harlan U. Anderson, Missouri University of Science and TechnologyFollow

Abstract

This paper is aimed at addressing some fundamental aspects of defect chemistry in p-type perovskite conductors, including determination of different oxidation states, contribution of various oxidations states to electronic conduction (p type and n type) and magnetic interaction, origin of nonstoichiometry and defect chemistry modeling. Studies on doped and undoped LaMnO3+δ, LaCrO3, LaFeO3 and La(Ni,Fe)O3 indicate that the electron hole conduction in perovskite mixed ionic-electronic conductors (MIECs) results from high oxidation state of B site cations, in which the electron holes are localized. the magnetic interaction, on the other hand, is attributed to the super exchange between B3+ and oxygen ions. the electron conduction in these systems is due to B2+; however some of the perovskites can not hold the structural integrity before B2+ cations are generated.

Recommended Citation

X. D. Zhou and H. U. Anderson, "Some Aspects of Defect Chemistry in P-Type Perovskite Conductors," Proceedings - Electrochemical Society, vol. PV 2005 thru 07, pp. 1479 - 1486, ECS Transactions, Dec 2005.

Department(s)

Materials Science and Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 ECS Transactions, All rights reserved.

Publication Date

01 Dec 2005