Current Photovoltaic Research

  • 제3권3호
  • /
  • Pages.75-79
  • /
  • 2015
  • /
  • 2288-3274(pISSN)
  • /
  • 2508-125X(eISSN)
한국태양광발전학회 (Korea Photovoltaic Society)
권호 표지
DOI QR코드

DOI QR Code

Effects of Se/(S+Se) Ratio on Cu2ZnSn(SxSe1-x)4 (CZTSSe) Thin Film Solar Cells Fabricated by Sputtering

  • Park, Ju Young (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Hong, Chang Woo (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Moon, Jong Ha (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University) ;
  • Gwak, Ji Hye (Photovoltaic Research Group, Korea Institute of Energy Research) ;
  • Kim, Jin Hyeok (Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, Chonnam National University)
  • 투고 : 2015.07.10
  • 심사 : 2015.07.16
  • 발행 : 2015.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Recently, $Cu_2ZnSn(S_xSe_{1-x})_4$ (CZTSSe) has been received a tremendous attraction as light absorber material in thin film solar cells (TFSCs), because of its earth abundance, inexpensive and non-toxic constituents and versatile material characteristics. Kesterite CZTSSe thin films were synthesized by sulfo-selenization of sputtered Cu/Sn/Zn stacked metallic precursors. The sulfo-selenization of Cu/Sn/Zn stacked metallic precursor thin films has been carried out in a graphite box using rapid thermal annealing (RTA) technique. Annealing process was done under sulfur and selenium vapor pressure using Ar gas at $520^{\circ}C$ for 10 min. The effect of tuning Se/(S+Se) precursor composition ratio on the properties of CZTSSe films has been investigated. The XRD, Raman, FE-SEM and XRF results indicate that the properties of sulfo-selenized CZTSSe thin films strongly depends on the Se/(S+Se) composition ratio. In particular, the CZTSSe TFSCs with Se/(S+Se) = 0.37 exhibits the best power conversion efficiency of 4.83% with $V_{oc}$ of 467 mV, $J_{sc}$ of $18.962mA/cm^2$ and FF of 54%. The systematic changes observed with increasing Se/(S+Se) ratio have been discussed in detail.

키워드

참고문헌

  1. B. Shin, O. Gunawan, Y.Zhu, N. A. Bofarczuk, S. J. Chey, S. Guha, "Thin film solar cell with 8.4% power conversion efficiency using an earth-abundant Cu2ZnSnS4 absorber", Progress in Photovoltaics: Research and Applications, 21(1), 72-76, 2013. https://doi.org/10.1002/pip.1174
  2. T. K. Todorov, K. B. Reuter, and D. B. Mitzi, "High-Efficiency Solar Cell with Earth-Abundant Liquid-Processed Absorber", Advanced materials, 22 (20), E156-E159, 2010. https://doi.org/10.1002/adma.200904155
  3. Kim, J., Hiroi, H., Todorov, T. K., Gunawan, O., Kuwahara, M., Gokmen, T, Mitzi, D. B., "High efficiency $Cu_2ZnSn(S,Se)_4$ solar cells by applying a double $In_2S_3$/CdS emitter", Advanced Materials, 26(44), 7427-7431, 2014. https://doi.org/10.1002/adma.201402373
  4. Chawla, Vardaan, and Bruce Clemens, "Effect of composition on high efficiency CZTSSe devices fabricated using co-sputtering of compound targets", In Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE. IEEE, 002990-002992, 2012.
  5. Samaneh Ranjbar, M. R. Rajesh Menon, P. A. Fernandes, A. F. da Cunha, A. F., "Effect of selenization conditions on the growth and properties of $Cu_2ZnSn(S,Se)_4$ thin films", Thin Solid Films, 582, 188-192, 2015. https://doi.org/10.1016/j.tsf.2014.11.044
  6. Mehmet Eray Erkan, Vardaan Chawla, Ingrid Repins, Michael A. Scarpulla, "Interplay between surface preparation and device performance in CZTSSe solar cells: Effects of KCN and $NH_4OH$ etching", Solar Energy Materials and Solar Cells, 136, 78-85, 2015. https://doi.org/10.1016/j.solmat.2015.01.006
  7. P.M.P Salome, J. Malaquias, P.A. Fernandes, M.S. Ferreira, A.F. Da Cunha, J.P. Leitao, J.C. Gonzalez, F.M. Matinaga, "Growth and characterization of $Cu_2ZnSn(S,Se)_4$ thin films for solar cells", Solar Energy Materials and Solar Cells, 101, 147-153, 2015.
  8. M. Grossberg, J. Krustok, J. Raudoja, K. Timmo, M. Altosaar, T. Raadik, "Photoluminescence and Raman study of $Cu_2ZnSn (SexS_{1-x})_4$ monograins for photovoltaic applications", Thin Solid Films, 519(21), 7403-7406, 2010. https://doi.org/10.1016/j.tsf.2010.12.099
  9. J. He, L. Sun, S. Chen, Y. Chen, P. Yang, J. Chu, "Composition dependence of structure and optical properties of $Cu_2ZnSn(S,Se)_4$ solid solutions: an experimental study", Journal of Alloys and Compounds, 511(1), 129-132, 2011. https://doi.org/10.1016/j.jallcom.2011.08.099