Skip to main content Accessibility help
×
Home

Observation of a Hydrogen Doublet Site in High Defect Density As-Grown a-Si:H by 1H NMR

  • D. Bobela (a1), T. Su (a1), P. C. Taylor (a1) and G. Ganguly (a2)

Abstract

1H NMR studies of hydrogenated amorphous silicon (a-Si:H) with ˜1017 cm-3 defects grown by PECVD with a rate of 5 Å/s show the existence of a hydrogen doublet for both asgrown and light-soaked samples. We observe the doublet over the temperature range from 5 to 20 K in a sample where no light soaking has occurred. The doublet line shapes display no narrowing over this temperature range. Vibrational modes characteristic of SiH2 wagging and scissor modes are seen from infrared spectroscopy. These results suggest that the doublet is due to SiH2 that occurs at a density of approximately 1 at. % in this sample. From line shape analysis, we estimate a lower limit of 1.8 ˜ for the hydrogen-to-hydrogen separation.

Copyright

References

Hide All
1 Stutzmann, M., Jackson, W. B., and Tsai, C. C., Phys. Rev. B 23, 23 (1985).10.1103/PhysRevB.32.23
2 Branz, H. M., Phys. Rev. B 59, 5498 (1999).10.1103/PhysRevB.59.5498
3 Su, T., Taylor, P.C., Ganguly, G., and Carlson, D.E., Phys. Rev. Lett. 89, 015502 (2002).10.1103/PhysRevLett.89.015502
4 Abtew, Tesfaye A., Drabold, D. A., and Taylor, P. C., Appl. Phys. Lett. (2005), in press.
5 Gupta, P., Colvin, V. L., and George, S. M., Phys. Rev. B 37, 8234 (1988).10.1103/PhysRevB.37.8234
6 Knights, J. C., and Lucovsky, G., CRC Critical Reviews in Solid State and Materials Science 21, 211.
7 Jeener, J. and Broekaert, P., Phys. Rev. 157, 232 (1967).10.1103/PhysRev.157.232
8 Reimer, J. A., Vaughn, R. W., and Knights, J.C., Phys. Rev. B 24, 3360 (1981).10.1103/PhysRevB.24.3360
9 Su, T., Chen, S., and Taylor, P. C., Phys. Rev. B 62, 12849 (2000).10.1103/PhysRevB.62.12849
10 Brodsky, M. H, Cardona, Manuel, and Cuomo, J. J., Phys. Rev. B 16, 3556 (1977).10.1103/PhysRevB.16.3556

Observation of a Hydrogen Doublet Site in High Defect Density As-Grown a-Si:H by 1H NMR

  • D. Bobela (a1), T. Su (a1), P. C. Taylor (a1) and G. Ganguly (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed