Wide Spectrum Absorption of CuGaS₂ with Intermediate Bands

Abstract:

The intermediate bands materials CuGa1-xQxS2 (Q = Ge, Sn) were investigated, and the narrow half-filled intermediate bands were successfully introduced into the chalcopyrite CuGaS2 when Ga3+ ion were partially replaced by Ge4+(Sn4+) impurities. The absorption edge of CuGa1-xQxS2 red shifts greatly with the increasing in the doping content due to the form of Ge-4s (Sn-5s) and S-3p hybridization orbits intermediate band, even small Q-doping content(2mol %), considerable red shifts are still achieved. CuGa1-xQxS2 (Q = Ge, Sn) with IBs extend the range of solar spectrum and could be the excellent candidates for the theoretical predictions of enhanced solar cell efficiency.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 1558-1561
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.1558
• Online since: December 2011
• Authors: Ming Sheng Qin, Fu Qiang Huang, Ping Chen
• Keywords: CuGaS₂, Intermediate Bands Material, Wide Spectrum Response

References

[1] D. Chopin, C. Fuller and G. Pearson: J. Appl. Phys. Vol. 25 (1954), pp.676-677.

[2] W. Shockley and H. J. Queisser: J. Appl. Phys. Vol. 32 (1961), p.510.

[3] G. L. Araujo and A. Marti: Solar Energy Mater. Solar Cells Vol. 33 (1994), p.213.

[4] A. Luque and A. Marti: Phys. Rev. Lett. Vol. 78 (1997), p.5014.

[5] C. Tablero and P. Wahnon: Appl. Phys. Lett. Vol. 82 (2003), p.151.

[6] A. Martí, D. F. Marrón and A. Luque: J. Appl. Phys. Vol. 103 (2008), p.073706.

[7] K. M. Yu, W. Walukiewicz, J. W. Ager，D. Bour, R. Farshchi, O. D. Dubon, S. X. Li, I. D. Sharp and E. E. Haller: Appl. Phys. Lett. Vol. 88 (2006), p.092110.

DOI: 10.1063/1.2181627

[8] K. M. Yu, W. Walukiewicz, J. Wu, W. Shan, J. W. Beeman, M. A. Scarpulla, O. D. Dubon, P. Becla: Phys. Rev. Lett. Vol. 91 (2003), p.246403.

DOI: 10.1103/physrevlett.91.246403

[9] C. H. Ho: J. Mater. Chem. Vol. 21 (2011), pp.10518-10524.

[10] I. Repins, M. A. Contreras, B. Egaas, C. DeHart, J. Scharf, C. L. Perkins, B. To and R. Noufi: Prog. Photovolt Vol. 16 (2008), p.235.

[11] C. H. Tsaia, J. M. Ting and R. R. Wang: Acta Mater. Vol. 59 (2011), pp.349-354.

[12] D. Young, J. Keane, A. Duda, J. AbuShama, C. Perkins, M. Romero and R. Noufi: Prog. Photovolt Vol. 11 (2003), p.535.

[13] T. Ohashi, Y. Hashimoto and K. Ito: Solar Energy Materials & Solar Cells Vol. 67 (2001), pp.225-230.

[14] S. Siebentritt: Thin Solid Films Vol. 403-404 (2002), pp.1-8.

[15] A. Martin, K. E. Green, Y. Hishikawa and W. Warta: Prog. Photovolt Vol. 18 (2010), pp.144-150.

[16] P. E. Blöchl: Phys. Rev. B Vol. 50 (1994), p.17953.

[17] J. Heyd, G. E. Scuseria and M. Ernzerhof: J. Chem. Phys. Vol. 118 (2003), p.8207.

[18] H. J. Monkhorst and J. D. Pack: Phys. Rev. B Vol. 13 (1976), p.5188.

[19] L. D. Partain, R. A. Schneider and L. F. Donaghey: J. Appl. Phys. Vol. 57 (1985), pp.5056-5068.

[20] A. P. Finlayson, V. N. Tsaneva, L. Lyons, M. Clark and B. A. Glowacki: Phys. Status Solidi A Vol. 203 (2006), p.327.