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TeknologiSel Surya  SatwikoSidopekso Sesion #05-06 JurusanFisika FakultasMatematikadanIlmuPengetahuanAlam
Outline Amorphous Silicon The Problem Photoluminescence Conclusion 06/01/2011 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      | 2
Modul P - V ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      | 3 06/01/2011
Amorphous Silicon Short range order only Band tails ,[object Object],Energy			   Density of States 06/01/2011 4 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
Staebler-Wronski Effect Degradation of luminescence intensity Reversible process 06/01/2011 5 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
Photoluminescence Laser light is incident on sample Emitted light is analyzed Intensity vs. Wavelength is plotted 06/01/2011 6 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
Photoluminescence of Amorphous Silicon ,[object Object]
Light soaked a-Si:H for 600 hours
Annealed a-Si:H 170 ยบC 4-hours06/01/2011 7 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
06/01/2011 8 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
ESR Counts unpaired electrons/dangling bonds As-grown	     2 x1016 cm-3 Light soaked 5 x1016 cm-3 Annealed      2 x 1016 cm-3 06/01/2011 9 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
NMR Sensitive to local hydrogen environment Metastable change in the hydrogen NMR line shape Measure increase in the number of hydrogen doublets  ,[object Object],06/01/2011 10 ยฉ  2010 Universitas Negeri Jakarta   |  www.unj.ac.id                      |
Interpretation of Results Light soaking causes: ,[object Object]
Increase in dangling bonds (measured by ESR)

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Teknologi Sel Surya (5 - 6)

  • 1. TeknologiSel Surya SatwikoSidopekso Sesion #05-06 JurusanFisika FakultasMatematikadanIlmuPengetahuanAlam
  • 2. Outline Amorphous Silicon The Problem Photoluminescence Conclusion 06/01/2011 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id | 2
  • 3. Modul P - V ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id | 3 06/01/2011
  • 4.
  • 5. Staebler-Wronski Effect Degradation of luminescence intensity Reversible process 06/01/2011 5 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 6. Photoluminescence Laser light is incident on sample Emitted light is analyzed Intensity vs. Wavelength is plotted 06/01/2011 6 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 7.
  • 8. Light soaked a-Si:H for 600 hours
  • 9. Annealed a-Si:H 170 ยบC 4-hours06/01/2011 7 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 10. 06/01/2011 8 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 11. ESR Counts unpaired electrons/dangling bonds As-grown 2 x1016 cm-3 Light soaked 5 x1016 cm-3 Annealed 2 x 1016 cm-3 06/01/2011 9 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 12.
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  • 14. Increase in dangling bonds (measured by ESR)
  • 15. Movement of hydrogen atoms (measured by NMR)All revert back to โ€œnormalโ€ after annealing 06/01/2011 11 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 16. Acknowledgments Weber State University Physics Dept. University of Utah Physics Dept. BP Solar Four Corners Section APS Trisha and Annie 06/01/2011 12 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id |
  • 17. 06/01/2011 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id | 13
  • 18. 06/01/2011 ยฉ 2010 Universitas Negeri Jakarta | www.unj.ac.id | 14 TerimaKasih