In this work, the AFORS-HET digital simulation
software was used to calculate the electrical characteristics of the
cell/n-ZnO/i-ZnO/n-Zn (O, S)/p-CIGSe2/p + -MoSe2/Mo/SLG.
When the thickness of the CIGSe2 absorber is between 3.5 and 1.5μm, the efficiency of the cell with an interfacial
layer of MoSe2 remains almost constant, with an efficiency of about
24.6%, higher to that of a conventional cell which is 23.4% for a thickness of
1.5 μm of CIGSe2. To achieve the expected results, the MoSe2 layer must be very thin less than or equal to 30 nm. In addition, a Schottky
barrier height greater than 0.45 eV severely affects the fill factor and the
open circuit voltage of the solar cell with MoSe2 interface layer.
References
[1]
Sylla, A. (2018) Modélisation et simulation d’une cellule solaire en couches minces à base de CuIn1-xGaxSe2 utilisant un tampon Zn(O, S). Université Félix Houphouet Boigny.
[2]
Green, M.A., Emery, K., Hishikawa, Y., Warta, W. and Dunlop, E.D. (2016) Solar Cell Efficiency Tables (Version 48). Progress Photovoltaics Journal, 24, 905-913. https://doi.org/10.1002/pip.2788
[3]
Friedlmeier, T.M., et al. (2015) Improved Photocurrent in Cu(In,Ga)Se2 Solar Cells: From 20.8% to 21.7% Efficiency. IEEE 42nd Photovoltaic Specialist Conference (PVSC), New Orleans, LA, 14-19 June 2015, 1-3. https://doi.org/10.1109/PVSC.2015.7356152
[4]
Solibro Press Release. (2014) Solibro Beats World Record for Solar Cells. Dated 12 June.
[5]
Solar Frontier Press Release. (2015) Solar Frontier Achieves World Record Thin- Film Solar Cell Efficiency: 22.3%. 8 December. https://doi.org/10.1016/j.jpcs.2005.09.087
[6]
Gloeckler, M. and Sites, J.R. (2005) Band-Gap Grading in Cu(In,Ga)Se Solar Cells. Journal of Physics and Chemistry of Solids, 66, 1891-1894. https://doi.org/10.1016/j.solener.2011.08.003
[7]
Saji, V.S., Choi, I.-H. and Lee, C.-W. (2011) Progress in Electrodeposited Absorber Layer for CuIn(1-x)GaxSe1 (CIGS) Solar Cells. Solar Energy, 85, 2666-2678. https://doi.org/10.1016/j.egypro.2010.07.009
[8]
Decocka, K., Lauwaerta, J. and Burgelmana, M. (2010) Characterization of Graded CIGS Solar Cells. Energy Procedia, 2, 49-54.
[9]
Varache, R. (2012) Développement, caractérisation et modélisation d’interfaces pour cellules solaires à haut rendement à base d’hétérojonctions de silicium. Thèse de Doctorat, Universite Paris-Sud.
[10]
Paulson, P.D., Birkmire, R.W. and Shafarman, W.N. (2003) Optical Characterization of CuIn(1-x)GaxSe Alloy Thin Films by Spectroscopic Ellipsometry. Journal of Applied Physics, 94, 879-888.
[11]
Raquel, C., et al. (2010) Cu Deficiency in Multi-Stage Co-Evaporated Cu(In,Ga)Se2 for Solar Cells Applications: Microstructure and Ga In-Depth Alloying. Acta Materialia, 58, 3468-3476.
