Browse > Article
http://dx.doi.org/10.4313/JKEM.2013.26.9.701

Efficiency Characteristics of Cu(In,Ga)Se2 Photovoltaic Thin Films According to the Mo:Na Thickness  

Shin, Younhak (Department of Advanced Materials Engineering, Chungbuk National University)
Kim, Myunghan (Department of Advanced Materials Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.26, no.9, 2013 , pp. 701-706 More about this Journal
Abstract
We have focused on the conversion efficiency of CIGS thin film solar cell prepared by co-evaporation method as well as the optimization of process condition. The total thickness of back electrode was fixed at 1 ${\mu}m$ and the structural, electric and optical properties of CIGS thin film were investigated by varying the thickness of Mo:Na bottom layer from 0 to 500 nm. From the experimental results, the content of Na was appeared as 0.28 atomic percent when the thickness of Mo:Na layer was 300 nm with compactly densified plate-shape surface morphology. From the XRD measurements, (112) plane was the strongest preferential orientation together with secondary (220) and (204) planes affecting to the crystallization. The lowest roughness and resistivity were 2.67 nm and 3.9 ${\Omega}{\cdot}cm$, respectively. In addition, very high carrier density and hole mobility were recorded. From the optimization of Mo:Na layer, we have achieved the conversion efficiency of 9.59 percent.
Keywords
Na; $Cu(In,Ga)Se_2$; Solar cell; Back electrode;
Citations & Related Records
연도 인용수 순위
  • Reference
1 K. Bouabid, A. Ihlal, A Manar, A. Outzourhit and E. L. Ameziane, Thin Solid Films, 488, 62 (2005).   DOI   ScienceOn
2 K. W. Mitchell, C. Eberspacher, J. Ermer and D. Pier, Proc. 20th IEEE Photovoltaic Specialists Conf., 1384, (1989).
3 A. M. Gabor, J. R. Tuttle, M. A. Contreras, D. S Albin, A. Franz, D. W. Niles, and R. Noufi, 12th European Photovoltaic Solar Energy Conf., 1 (1994).
4 W. K. Batchelor, I. L. Repins, J. Schaefer, M. E. Beck, Sol. Energ. Mater. Sol. Cell., 83, 67 (2004).   DOI   ScienceOn
5 J. H. Scofield, A. Duba, D. Albin, B. L. Ballard, P. K. Predecki, Thin Solid Films, 260, 26 (1995).   DOI   ScienceOn
6 R. J. Matson, J. E. Granata, S. E. Asher and M. R. Young, NREL, 25682, 6 (1998).
7 K. granath, M. bodegard, and L. Stolt, Sol. Energy Mater. Sol. Cells, 60, 279 (2000).   DOI   ScienceOn
8 M. Lammer, U. Klemm, and M. Powalla, Thin Solid Films, 387, 33 (2001).   DOI   ScienceOn