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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Self-assembled single-phase perovskite nanocomposite thin films
Hyun-Suk Kim1, Lei Bi, Hanjong Paik
1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Nano Letters
|December 31, 2009
Summary
Researchers grew novel self-assembled nanocomposite strontium titanate iron oxide (Sr(Ti,Fe)O3) thin films on silicon. These unique epitaxial structures offer potential for advanced spintronic and magnetooptical devices.
Area of Science:
- Materials Science
- Solid State Physics
- Thin Film Technology
Background:
- Perovskite-structured oxides (ABO3) exhibit diverse electronic properties crucial for devices.
- Film microstructure, orientation, and strain significantly influence these properties.
- Existing self-assembled oxide nanocomposites have limitations in composition or structure.
Purpose of the Study:
- To demonstrate the growth of cubic Sr(Ti,Fe)O3 (STF) films with a unique self-assembled nanocomposite microstructure.
- To investigate the epitaxial relationship between the nanocomposite film and the silicon substrate.
- To explore the potential for integrating these structures with other materials for advanced devices.
Main Methods:
- Epitaxial growth of cubic Sr(Ti,Fe)O3 thin films on silicon substrates.
- Characterization of film microstructure and crystallographic orientation.
- Growth of SrTiO3 overlayers on STF films.
Main Results:
- Successful growth of cubic STF films with a self-assembled nanocomposite microstructure.
- The nanocomposite consists of coexisting (100) and (110)-oriented crystals, both homoepitaxial with each other and the Si substrate.
- An epitaxial SrTiO3 overlayer can be grown on the STF nanocomposite.
Conclusions:
- The demonstrated STF nanocomposite structure is novel and differs from previously reported self-assembled oxide materials.
- This offers a pathway for creating self-organized hybrid nanostructures on silicon.
- Potential applications include magnetooptical and spintronic devices integrated on silicon substrates.
