Molecular dynamics simulations of grain boundaries in thin nanocrystalline silicon films
- Los Alamos National Lab., NM (United States)
- Illinois Univ., Urbana, IL (United States). Dept. of Physics
Using molecular dynamics simulations, the grain boundaries in thin polycrystalline silicon films (considered as promising material for future nanoelectronic devices) are investigated. It is shown that in polysilicon film with randomly oriented grains the majority of grain boundaries are disordered. However, some grains with small mutual orientation differences can form extended crystalline patterns. The structure of the grain boundaries satisfies the thermodynamical criterion. The majority of atoms in the grain boundaries are tetrahedrally coordinated with the nearest neighbors, even though the grain boundaries are disordered. The grain boundary matter is characterized as an amorphous phase with a characteristic tetragonality value.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Management and Administration, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 292865
- Report Number(s):
- LA-UR--97-4273; CONF-9710155--; ON: DE98003004
- Country of Publication:
- United States
- Language:
- English
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