Proceedings of the Korean Vacuum Society Conference (한국진공학회:학술대회논문집)
- 2015.08a
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- Pages.86.2-86.2
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- 2015
Fabrication of a Cu2ZnSn(S,Se)4 thin film solar cell with 9.24% efficiency from a sputtered metallic precursor by using S and Se pellets
- Gang, Myeong-Gil ;
- Hong, Chang-U ;
- Yun, Jae-Ho ;
- Gwak, Ji-Hye ;
- An, Seung-Gyu ;
- Mun, Jong-Ha ;
- Kim, Jin-Hyeok
- 강명길 (전남대학교) ;
- 홍창우 (전남대학교) ;
- 윤재호 (한국에너지기술연구원) ;
- 곽지혜 (한국에너지기술연구원) ;
- 안승규 (한국에너지기술연구원) ;
- 문종하 (전남대학교) ;
- 김진혁 (전남대학교)
- Published : 2015.08.24
Abstract
Cu2ZnSn(S,Se)4 thin film solar cells have been fabricated using sputtered Cu/Sn/Zn metallic precursors on Mo coated sodalime glass substrate without using a toxic H2Se and H2S atmosphere. Cu/Sn/Zn metallic precursors with various thicknesses were prepared using DC magnetron sputtering process at room temperature. As-deposited metallic precursors were sulfo-selenized inside a graphite box containing S and Se pellets using rapid thermal processing furnace at various sulfur to selenium (S/Se) compositional ratio. Thin film solar cells were fabricated after sulfo-selenization process using a 65 nm CdS buffer, a 40 nm intrinsic ZnO, a 400 nm Al doped ZnO, and Al/Ni top metal contact. Effects of sulfur to selenium (S/Se) compositional ratio on the microstructure, crystallinity, electrical properties, and cell efficiencies have been studied using X-ray diffraction, Raman spectroscopy, field emission scanning electron microscope, I-V measurement system, solar simulator, quantum efficiency measurement system, and time resolved photoluminescence spectrometer. Our fabricated Cu2ZnSn(S,Se)4 thin film solar cell shows the best conversion efficiency of 9.24 % (Voc : 454.6 mV, Jsc : 32.14 mA/cm2, FF : 63.29 %, and active area : 0.433 cm2), which is the highest efficiency among Cu2ZnSn(S,Se)4 thin film solar cells prepared using sputter deposited metallic precursors and without using a toxic H2Se gas. Details about other experimental results will be discussed during the presentation.