Adequate Method for Decoupling Bulk Lifetime and Surface Recombination Velocity in Silicon Wafers

• Authors: N. Khelifati , D. Bouhafs , A. Mebarek-Azzem , S. El-Hak Abaidia , B. Palahouane , Y. Kouhlane
• Languages of publication: EN

Abstracts

EN

In this paper, we present an appropriate method of decoupling surface and bulk recombination processes in silicon wafers. The study was carried out using the surface passivation of multicrystalline silicon wafers by ethanolic solution of iodine at different molarities varying between 0.01 M and 0.1 M. The effect of the concentration of ethanolic iodine solution on surface passivation effectiveness was investigated by using quasi steady state photo-conductance technique. Reproducible experiments have shown that the best passivation is reached for a molarity of around 0.02 M. The carrier lifetime after passivation at 0.02 M has been improved by more than one order of magnitude, compared to that of the same wafer before the passivation. Using an adequate modeling of minority carrier lifetime curves τ (Δ n), based on Hornbeck-Haynes model, surface recombination velocity was calculated. The minimum values of surface recombination velocity have been found to be approximately 120 cm/s for 0.02 M. The modeling results indicate that the minority carrier lifetime improvement can be easily correlated with the decrease of the surface recombination velocity for a fixed bulk lifetime τ_{b}=115 μs.

Keywords

EN

68.47.FG; 88.40.H-

Discipline

• 88.40.H-: Solar cells (photovoltaics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 1
• Pages: 188-190

Dates

published

2016-07

Contributors

author

N. Khelifati

• Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique (CRTSE), DDCS, Algiers, Algeria
• Université M'hamed Bougara (UMBB), Faculté des Sciences, Boumerdes, Algeria

author

D. Bouhafs

• Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique (CRTSE), DDCS, Algiers, Algeria

author

A. Mebarek-Azzem

• Université de Sétif, Faculté des sciences-Département de physique, Sétif, Algeria

author

S. El-Hak Abaidia

• Université M'hamed Bougara (UMBB), Faculté des Sciences, Boumerdes, Algeria

author

B. Palahouane

• Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique (CRTSE), DDCS, Algiers, Algeria

author

Y. Kouhlane

• Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique (CRTSE), DDCS, Algiers, Algeria

References

• [1] B. Sopori, S. Devayajanam, P. Basnyat, V. Mehta, H. Moutinho, B. Nemeth, V. LaSalvia, S. Johnston, N.M. Ravindra, J. Binns, J. Appel, in: Symposium E/H - Advances in the Characterization, Performance and Defect Engineering of Earth Abundant and Thin-Film Materials for Solar Energy Conversion, MRS Proceedings, Vol. 1670, Materials Research Society, 2014, p. mrss14-1670-h05-02, doi: 10.1557/opl.2014.591
• [2] S. Aouida, N. Bachtouli, B. Bessais, Appl. Surf. Sci. 274, 255 (2013), doi: 10.1016/j.apsusc.2013.03.029
• [3] A.W. Stephens, M.A. Green, Sol. Energ. Mater. Sol. Cells. 45, 255 (1997), doi: 10.1016/S0927-0248(96)00061-X
• [4] B. Chhabra, S. Bowden, R.L. Opila, C.B. Honsberg, Appl. Phys. Lett. 96, 063502 (2010), doi: 10.1063/1.3309595
• [5] B.P. Swain, H. Takato, I. Sakata, Appl. Phys. Express 2, 105501 (2009), doi: 10.1143/APEX.2.105501
• [6] D. Ouadjaout, Y. Gritli, L. Zair, M. Boumaour, Revue des Energies Renouvelables 8, 49 (2005)
• [7] J.A. Hornbeck, J.R. Haynes, Phys. Rev. 97, 311 (1955), doi: 10.1103/PhysRev.97.311
• [8] J.R. Haynes, J.A. Hornbeck, Phys. Rev. 100, 606 (1955), doi: 10.1103/PhysRev.100.606
• [9] A. Bentzen, Ph.D. Thesis, University of Oslo, 2006
• [10] N. Khelifati, D. Bouhafs, M. Boumaour, Mat. Sci. Semicon. Proc. 15, 56 (2012), doi: 10.1016/j.mssp.2011.08.005

Identifiers

DOI

10.12693/APhysPolA.130.188