Aqueous Chemical Solution Deposition of Epitaxial Lead-Free Ferroelectric Sodium Potassium Niobate (KNN) thin films

Simple item page
dc.contributor.advisorDolgos, Michelle
dc.contributor.authorMohammed, Ahmed Zaher
dc.contributor.committeememberBirss, Viola Ingrid
dc.contributor.committeememberShi, Yujun
dc.contributor.committeememberRoberts, Edward
dc.contributor.committeememberShimizu, George
dc.date2023-11
dc.date.accessioned2023-05-25T19:01:50Z
dc.date.available2023-05-25T19:01:50Z
dc.date.issued2023-05-12
dc.description.abstractPotassium Sodium Niobate (KxNa1-xNbO3, KNN) thin films were fabricated on SrTiO3 (STO) substrates using an environmentally friendly aqueous Chemical Solution Deposition (CSD) approach, employing water-soluble Na, K, and Nb polyoxometalate precursors. This green route for KNN thin film fabrication offers reduced environmental impact and potential industrial scalability. The annealing recipe was optimized through a detailed investigation, finding that a one-minute annealing at 700°C after each deposition yielded the best structural properties. The impact of varying the K+/Na+ stoichiometry on the films' structural properties was systematically examined. The investigation demonstrated a trend between the K+/Na+ molar ratio in the precursor solution and the strain-state and lattice parameters of the resulting films, suggesting adding 50% excess potassium in the precursor solution is promising for optimal ferroelectric performance. Leveraging the versatility of the aqueous synthesis, lithium was incorporated as a dopant in the precursor solution. Different Li concentrations were investigated, and it was determined that a 6% Li concentration improved the films' structure compared to undoped samples. This demonstrates the potential of aqueous deposition for incorporating dopants to enhance material properties. The study further highlighted the potential for strain engineering and additional dopant incorporation using the aqueous CSD method, opening up avenues for further exploration and optimization of KNN thin films' properties.
dc.identifier.citationMohammed, A. Z. (2023). Aqueous chemical solution deposition of epitaxial lead-free ferroelectric sodium potassium niobate (KNN) thin films (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.
dc.identifier.urihttps://hdl.handle.net/1880/116573
dc.identifier.urihttps://dx.doi.org/10.11575/PRISM/41416
dc.language.isoen
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgary
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject.classificationChemistry--Inorganic
dc.titleAqueous Chemical Solution Deposition of Epitaxial Lead-Free Ferroelectric Sodium Potassium Niobate (KNN) thin films
dc.typemaster thesis
thesis.degree.disciplineChemistry
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.thesis.accesssetbystudentI require a thesis withhold – I need to delay the release of my thesis due to a patent application, and other reasons outlined in the link above. I have/will need to submit a thesis withhold application.
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
ucalgary_2023_mohammed_ahmed.pdf
Size:
6.97 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.62 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Restricted Theses and Dissertations