Journal
JOURNAL OF THE KOREAN CERAMIC SOCIETY
Volume 57, Issue 1, Pages 24-39Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s43207-019-00003-1
Keywords
Perovskites; Sensors; Doping; Oxygen vacancies; Porosity
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Funding
- Ministry of Trade, Industry and Energy (Korea) under the Industrial Technology Innovation Program [10070075]
- National Research Foundation of Korea (NRF) [2014R1A4A1003712]
- Wearable Platform Materials Technology Center (WMC) - National Research Foundation of Korea (NRF) Grant of the Korean Government (MSIP) [2016R1A5A1009926]
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Perovskite-type oxides with general stoichiometry ABO(3) (A is a lanthanide or alkali earth metal, and B is transition metal) constitute a rich material playground for application as resistive-type gas-sensing layers. Immense interest is triggered by, among other factors, stability of abundant elements (approximate to 90% in the periodic table) in this stoichiometry, relatively easy tunability of structure and chemical composition, and their off-stoichiometry stability upon doping. Moreover, their capability to host cationic and abundant oxygen vacancies renders them with excellent electrical and redox properties, and synergistic functions that influence their performance. Herein, we present an overview of recent development in the use of ABO(3) perovskites as resistive-type gas sensors, clearly elucidating current experimental strategies, and sensing mechanisms involved in realization of enhanced sensing performance. Finally, we provide a brief overview of limitations that hamper their potential utilization in gas sensors and suggest new pathways for novel applications of ABO(3) materials.
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