Abstract:
Gap states induced by weak bond and hydrogen movement in a-Si:H have been investigated on the basis of DV-X/spl alpha/ molecular orbital theory. Two energy levels appear ...Show MoreMetadata
Abstract:
Gap states induced by weak bond and hydrogen movement in a-Si:H have been investigated on the basis of DV-X/spl alpha/ molecular orbital theory. Two energy levels appear near both sides of band edge, and shift to the gap center, while the weak bond is stretched and the bonded H atom is moved to the neighboring Si or Ge atoms. These additional states deep in the energy gap are due to the modification of bonding states, decreasing the electrical conductivity of a-Si:H. These facts give a possible explanation of light-induced degradation, when the weak bond and the movement of bonded H atoms are induced by prolonged exposure to intense light.
Date of Conference: 05-09 December 1994
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-1460-3
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Molecular Orbitals ,
- Thin Films ,
- Hydrogenation ,
- Energy Levels ,
- Bond Lengths ,
- Energy Gap ,
- Electronic States ,
- H Atoms ,
- Weak Bonds ,
- Metastable State ,
- Si Atoms ,
- Ab Initio Molecular Dynamics ,
- Gap States ,
- Light-induced Changes ,
- Migration Of Atoms ,
- Ge Atoms ,
- Photoinduced Changes ,
- Amorphous Network ,
- Bond Angles ,
- Fermi Level ,
- Energy Level Diagram ,
- Weak State ,
- Mesh Points ,
- Antibonding States
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Molecular Orbitals ,
- Thin Films ,
- Hydrogenation ,
- Energy Levels ,
- Bond Lengths ,
- Energy Gap ,
- Electronic States ,
- H Atoms ,
- Weak Bonds ,
- Metastable State ,
- Si Atoms ,
- Ab Initio Molecular Dynamics ,
- Gap States ,
- Light-induced Changes ,
- Migration Of Atoms ,
- Ge Atoms ,
- Photoinduced Changes ,
- Amorphous Network ,
- Bond Angles ,
- Fermi Level ,
- Energy Level Diagram ,
- Weak State ,
- Mesh Points ,
- Antibonding States
