| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
|
|
|
|
Developments of High-Efficiency Flexible Cu(In,Ga)Se2 Thin Film Solar Cells on a Polyimide Sheet by Sodium Incorporation |
| ZHANG Li1**, LIU Fang-Fang1, LI Feng-Yan1, HE Qing1, LI Chang-Jian1, LI Bao-Zhang1, ZHU Hong-Bing2 |
1Tianjin Key Laboratory for Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300071
2College of Physics Science and Technology, Hebei University, Baoding 071002
|
|
| Cite this article: |
|
ZHANG Li, LIU Fang-Fang, LI Feng-Yan et al 2014 Chin. Phys. Lett. 31 068402 |
|
|
|
|
Abstract We present the fabrication of flexible Cu(In,Ga)Se2 (CIGS) solar cells on a polyimide (PI) sheet with and without Na incorporation. A sodium element is incorporated into the CIGS absorber by using a NaF precursor after Mo back contact deposition. X-ray diffraction patterns show that the (112) preferred orientation of the as-grown CIGS films is decreased by Na incorporation. The secondary phase of (Inx,Ga1?x)2Se3 is observed for the CIGS films with Na. There is no significant difference in the grain size with and without Na incorporation from surface and cross-sectional SEM images. Additionally, the increase of carrier concentration and decrease of resistivity of CIGS absorber are induced by Na doping. Finally, the flexible CIGS solar cells on PI sheets with efficiency close to 11%, containing Na, are achieved. The improvement of cell efficiency can be attributed to the modified electrical properties of the CIGS film by Na incorporation.
|
|
|
Published: 26 May 2014
|
|
|
|
|
|
|
|
[1] Green M, Emery K, Hishikawa Y, Warta W and Dunlop E D 2013 Prog. Photovolt.: Res. Appl. 21 1
[2] Zhang L, He Q, Jiang W L, Li C J and Sun Y 2009 Chin. Phys. Lett. 26 026801
[3] Yamaguchi M 1995 J. Appl. Phys. 78 1476
[4] Gay R R 1997 Prog. Photovolt.: Res. Appl. 5 337
[5] Birkmire R, Eser E, Fields S and Shafarman W 2005 Prog. Photovolt.: Res. Appl. 13 141
[6] Kessler F and Rudmann D 2004 Sol. Energy 77 685
[7] Shafarman W N and Zhu J 2000 Thin Solid Films 361 473
[8] ?rd M B, Granath K and Stolt L 2000 Thin Solid Films 361 9
[9] Kessler J, Chityuttakan C, Sch?ldstr?m J and Stolt L 2003 Thin Solid Films 431 1
[10] Lammer M, Klemm U and Powalla M 2001 Thin Solid Films 387 33
[11] Wei S H, Zhang S B and Zunger A 1999 J. Appl. Phys. 85 7214
[12] Kessler F and Rudmann D 2004 Sol. Energy 77 685
[13] Zhang L, He Q, Jiang W L, Li C J and Sun Y 2008 Chin. Phys. Lett. 25 734
[14] Zhang L, He Q, Jiang W L, Liu F F, Li C J and Sun Y 2009 Sol. Energy Mater. Sol. Cells 93 114
[15] Zhang L, Liu, F F, Li, F Y, He Q, Li, B Z and Li C J 2012 Sol. Energy Mater. Sol. Cells 99 356
[16] Marion S and Uwe R 2001 Thin Solid Films 387 141
[17] Chaisitsak S, Yamada A and Konagai M 2002 Jpn. J. Appl. Phys. 41 507
[18] Jiang W L, Zhang L, He Q, Li F Y, Zhou Z Q, Liu W, Li B Z, Li C J and Sun Y 2008 Proc. 33rd Photovoltaic Specialists Conf. (San Diego, USA 11–16 May 2008) p 978
[19] Pauw L J 1958 Philips Res. Rep. 13 1
[20] Ruckh M, Schmid D, Kaiser M, Sch?ffler R, Walter T and Schock H W 1994 Proc. 1st World Conf. on Photovoltaic Energy Conversion (New York, USA 5–9 December 1994) p 156 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
