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Meeting MS&T22: Materials Science & Technology
Symposium Energy Materials for Sustainable Development
Presentation Title Bandgap Engineering and Electrochemical Properties of Disordered LaFeO3 and Heterostructures
Author(s) Uma Sharma, Priyanka A Jha, Pardeep Kumar Jha, Prabhakar Singh
On-Site Speaker (Planned) Prabhakar Singh
Abstract Scope We systematically substituted hole (Sr) at La-site and electron (Ti) at Fe-site in LaFeO3. All the investigated samples are oxygen-rich and show orthorhombic (Pbnm) phase. La0.5Sr0.5FeO3 proves to be a robust and efficient electrode due to chronopotentiometry stability with a potential of 2 V (vs Ag/AgCl) at a higher current of 150 mA/cm2. Trap state in the case of LSFT (La0.5Sr0.5Fe0.5Ti0.5O3) shifts the Fermi level toward the conduction band, which leads to the formation of cation vacancies and makes it less stable at low currents. In our extended study, we were able to reduce these cation vacancies and least surface charge degradation by changing medium and found system stable at least for ~ 1000 h. in order to enhance the hole transport number, we intercalated LSFT with ZnO thin layer using pulsed laser deposition. Our results suggest that the band gap engineering can tailor the electrochemical behaviour of the system.
Proceedings Inclusion? Undecided

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