Skip to main content Accessibility help

Kinetics of Light Induced Changes in Protocrystalline Thin Film Materials and Solar Cells

  • Randy Koval (a1), Xinwei Niu (a1), Joshua Pearce (a1), Lihong Jiao (a1), Gautam Ganguly (a2), Jeffrey Yang (a3), Subhendu Guha (a3), Robert W. Collins (a1) and Christopher R. Wronski (a1)...


Studies have been carried out on the kinetics of light induced changes in thin films and solar cells fabricated in different laboratories. Unlike the many studies on undiluted a-Si:H films the kinetics reported here are for 1 sun illuminations carried out to the degraded steady state (DSS). The light induced changes at temperatures from 25 to 100°C were characterized with electron mobility lifetime products and subgap absorption in films and fill factors in solar cells. The significant changes in the degradation kinetics that occur in these materials in this t mperature range have further confirmed the importance of charged defects, not only in the annealed state, but also in the degraded steady states. Results are also presented on corresponding solar cell structures, which also indicate that defects other than neutral dangling bonds have to be taken into account if any meaningful evaluation is to be made of their solar cell properties.



Hide All
1. Lee, Y., Jiao, L., Liu, H., Lu, Z., Collins, R.W. and Wronski, C.R., Conf. Record 25th IEEE PVSEC, 1165 (1996).
2. Koval, R. J., Koh, J., Lu, Z., Lee, Y., Jiao, L., Collins, R.W., and Wronski, C.R., Mater. Res. Soc. Symp. Proc. 557, 263 (1999).
3. Koh, J., Lee, Y., Fujiwara, H., Wronski, C.R., and Collins, R.W., Appl. Phys. Lett. 73, 1526 (1998).
4. Ferlauto, A. S., Koh, J., Rovira, P. I., Wronski, C.R., and Collins, R.W., Mater. Res. Soc. Symp. Proc. 557, 579 (1999).
5. Jiao, L., Semoushikiana, S., Lee, Y., and Wronski, C.R., Mater. Res. Soc. Symp. Proc. 467, 97 (1997).
6. Jiao, L., Ph.D. Thesis, The Pennsylvania State University (1998).
7. Stutzmann, M., Jackson, W.B., and Tsai, C.C., Phys. Rev. B 32, 23 (1985).
8. Lu, Z., Jiao, L., Koval, R. J., Collins, R.W., and Wronski, C.R., Mater. Res. Soc. Symp. Proc. 557, 785 (1999).
9. Wronski, C.R. and Daniel, R.E., Phys. Rev. B 23, 794 (1981).
10. Jiao, L., Liu, H., Semoushikiana, S., Lee, Y., and Wronski, C.R., Appl. Phys. Lett. 69, 3713 (1996).
11. Han, D. and Fritzche, H., J. Non-Cryst. Solid 59–60, 397 (1983).
12. Roedern, Bolko von., Appl. Phys. Lett. 62, 1368 (1993).
13. Yang, L., Chen, L., and Catalano, A., Appl. Phys. Lett. 59, 840 (1991).
14. Stradins, P. and Fritzsche, H., Phil. Mag. B 69, 121 (1994).
15. Vasanth, K., Wagner, S., Caputo, D., and Bennett, M., Conf. Record 24 th IEEE PVSEC, 488 (1994).
16. Wagner, S., Xu, X., Li, X.R., Shen, D.S., Isomura, M., Bennett, M., Delahoy, A.E., Li, X., Arch, J.K., Nicque, J.L., Fonash, S.J., Conf. Record 22 nd IEEE PVSEC, 1307 (1991).


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