화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.20, No.12, 649-653, December, 2010
레이저를 이용한 결정질 실리콘 태양전지의 Double Texturing 제조 및 특성
Characteristics of Double Texturization by Laser and Reactive Ion Etching for Crystalline Silicon Solar Cell
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In this paper, double texturization of multi crystalline silicon solar cells was studied with laser and reactive ion etching (RIE). In the case of multi crystalline silicon wafers, chemical etching has problems in producing a uniform surface texture. Thus various etching methods such as laser and dry texturization have been studied for multi crystalline silicon wafers. In this study, laser texturization with an Nd:YVO4 green laser was performed first to get the proper hole spacing and 300 μm was found to be the most proper value. Laser texturization on crystalline silicon wafers was followed by damage removal in acid solution and RIE to achieve double texturization. This study showed that double texturization on multi crystalline silicon wafers with laser firing and RIE resulted in lower reflectance, higher quantum yield and better efficiency than that process without RIE. However, RIE formed sharp structures on the silicon wafer surfaces, which resulted in 0.8% decrease of fill factor at solar cell characterization. While chemical etching makes it difficult to obtain a uniform surface texture for multi crystalline silicon solar cells, the process of double texturization with laser and RIE yields a uniform surface structure, diminished reflectance, and improved efficiency. This finding lays the foundation for the study of low-cost, high efficiency multi crystalline silicon solar cells.
  1. Abbott M, Cotter J, Progress in Photovoltaics : Research and Applications, 14, 225 (2006)
  2. Lee BH, Kim TY, Kim JE, Suh KS, J.KIEEME, (in Korean), 15(2), 153 (2002)
  3. Lee JS, Kwon S, Park H, Kim YD, Kim HJ, Lim H, Yoon S, Kim D, Korean J. Mater. Res., 19(1), 18 (2009)
  4. Hwang SW, Moon IS, Kim DS, Lee SH, in Proceedings of the Korean Solar Energy Society Symposium(Pukyong National University, Busan, Nov. 2001) p.66. (2001)
  5. Lee JE, Lim DG, Yi JS, Principle of Solar Cell, p.280-299, Hongrung Publishing Company, Seoul (2005). (2005)
  6. Marstein ES, Solheim HJ, Wright DN, Holt A, in Proceedings of the 31th IEEE PVSC (Orlando, FL, Jan. 2005) p.1309. (2005)
  7. Dobrzanski LA, Drygala A, J. AMME, 31, 77 (2008)
  8. Willeke G, Fath P, Appl. Phys. Lett., 64(10), 1274 (1994)
  9. Kumaravelu G, Alkaisi MM, Bittar A, in Proceedings of the 29th IEEE PVSC (Louisiana, New Orleans, May 2002) p.258 (2002). (2002)
  10. Dobrzanski LA, Drygala A, Golombek K, Panek P, Bielanska E, Zieba P, J. Mater. Process. Tech., 201, 291 (2008)
  11. Lee JS, Kim KH, Solar Cell Engineering, p.2-174, Green, Seoul, (2007). (2007)
  12. Baek SH, Lee JC, Park SH, Song J, Yoon KH, Wang JS, Lee HD, Cho JS, Korean J. Mater. Res., 20(10), 501 (2010)