Journal article
Effect of annealing conditions on the electrical properties of ALD-grown polycrystalline BiFeO3 films
Journal of materials chemistry. C, Materials for optical and electronic devices, v 6(20), pp 5462-5472
28 May 2018
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
An investigation of the influence of annealing conditions on the carrier transport, leakage current and dielectric properties of ALD-grown amorphous Bi-Fe-O thin films after their crystallization into BiFeO3 is presented. Whereas the interface-limited Schottky emission mechanism is dominant in 70 nm thick Fe-rich films after relatively short annealing, a space-charge-limited conduction mechanism is dominant in stoichiometric films with a thickness of 215 nm independent of the annealing conditions. Interestingly, prolonged annealing of the thin films also results in space charge limited conduction. Analysis of the changes in dielectric properties, on one hand, and the film composition, microstructure and morphology, on the other hand, reveal the key role of grain boundary interfaces for the conductivity of the polycrystalline ALD-grown BiFeO3 thin films. Extended annealing in oxygen results in 2-3 orders-of-magnitude reduction in leakage current accompanied by decreases in dielectric loss, highlighting the importance of optimizing annealing conditions for any applications of BiFeO3 thin films.
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Details
- Title
- Effect of annealing conditions on the electrical properties of ALD-grown polycrystalline BiFeO3 films
- Creators
- Iryna S. Golovina - Drexel UniversityMatthias Falmbigl - Drexel UniversityAleksandr V. Plokhikh - Drexel UniversityThomas C. Parker - United States Army Research LaboratoryCraig Johnson - Drexel UniversityJonathan E. Spanier - Drexel University
- Publication Details
- Journal of materials chemistry. C, Materials for optical and electronic devices, v 6(20), pp 5462-5472
- Publisher
- Royal Soc Chemistry
- Number of pages
- 11
- Grant note
- Army Research Laboratory; United States Department of Defense; US Army Research Laboratory (ARL) N00014-15-11-2170 / Office of Naval Research DMR 1040166; CBET 0959361 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Office of Research (and Innovation); Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000433258300016
- Scopus ID
- 2-s2.0-85047536829
- Other Identifier
- 991019168356704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied