Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-12-01T09:13:41.673Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of Recombination in Cu(In,Ga)Se2 Solar Cells by Time-Resolved Photoluminescence

Published online by Cambridge University Press:  01 February 2011

Sho Shirakata  and
Tokio Nakada
Sho Shirakata
Affiliation:
[email protected], Ehime University, Electric and Electronic Engineering, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan, +81-89-927-9772, +81-89-927-9789
Tokio Nakada
Affiliation:
[email protected], Aoyama Gakuin University, Electrical Engineering and Electronics, 5-1-10 Fuchinobe, Sagamihara, Kanagawa 229-8558, Japan
Get access

Abstract

Time-resolved PL (TR-PL) measurements have been carried out on Cu(In1-x,Gax)Se2 (CIGS) thin films and solar cells to study the recombination of photo-generated minority carriers . Room temperature PL of both CIGS thin films and solar cells exhibited band-to-band transition for alloy composition x of 0-0.4, and PL decay curves have been utilized as a measure of carrier lifetime. The solar cell fabrication leads to the enhancement of band-to-band PL intensity, reduction of defect-related PL, and increase of PL decay time. It is noted that the increase in PL decay time has been observed in CIGS films after CBD-CdS deposition. Solar cells with high conversion efficiency are characterized by both high PL intensity and long PL decay time. The PL decay curve of CIGS solar cell is studied in terms of the alloy composition x. For small x, PL decay times of CIGS solar cells are almost independent of the emission photon energy. For large x, PL decay time depended on PL emission energy. he result suggests the change of the recombination mechanism in the CIGS solar cells with the change in the alloy composition x.

Keywords

luminescencethin filmphotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1012: Symposium Y – Thin-Film Compound Semiconductor Photovoltaics-2007 , 2007 , 1012-Y04-06
Copyright
Copyright © Materials Research Society 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Contreras, M.A., Ramanathan, K., AbuShama, J., Hasoon, F., Young, D.L., Egaas, B., and Noufi, R., Prog. Photovolt. Res. Appl. 13, 209 (2005).Google Scholar
2. Shafarman, W.N., Klenk, R., and McCandless, B.E., J. Appl. Phys. 79, 7324 (1996).Google Scholar
3. Herberholz, R., Nadenau, V., Ruhle, U., Koble, C., Shock, H.W., and Dimmler, B., Sol. Energy Mater. Sol. Cells 49, 227 (1997).Google Scholar
4. Bacher, G., Braun, W., Ohnesorge, B., Forchel, A., Karg, F.W., and Riedl, W., Cryst. Res. Technol. 31, 737 (1996).Google Scholar
5. Ohnesorge, B., Weigand, R., Bacher, G., Forchel, A., Riedl, W., and Karg, F.H., Appl. Phys. Lett. 73, 1224 (1998).Google Scholar
6. Palm, J., Probst, V., and Karg, F.H., Sol. Energy 77, 757 (2004).Google Scholar
7. Metzger, W.M., Albin, D., Leivl, D., Scheldon, P., Li, X., Keyes, B.M., and Ahrenkiel, R.A., J. Appl. Phys. 94, 3549 (2003).Google Scholar
8. Shirakata, S. and Nakada, T., Thin Solid Films 515, 6151 (2007).Google Scholar
9. Nakada, T., Iga, D., Ohbo, H., and Kunioka, A., Jpn. J. Appl. Phys. 36, 732(1997).Google Scholar
10. Paorici, C., Zanotti, L., Romeo, N., Sberveglieri, G., and Tarricone, L.: Sol. Energy Mater. 1, 3 (1979).Google Scholar