Band Gap Optimization of CdTeSe Thin-Film Solar Cells
DOI:
https://doi.org/10.24297/jap.v12i2.5247Keywords:
CdTe, CdTeSe, Thin Film, Solar cell, Band gap structures, Band-gap gradingAbstract
Device modeling and simulation studies of a CdTeSe thin film solar cell have been carried out. A variety of band-gap profiles, including ungraded, front graded, back graded, and double graded profiles of the CdTeSe absorber layer are examined and their performance characteristics have been analyzed. The calculation reveals that single junction cells with band-gap at the optimum value of 1.38 eV exhibit the maximum performance; alloys of CdTe and CdSe with a ratio of 1:1 forming CdTe0.5Se0.5 achieve the band-gap of 1.38 eV due to the bowing effect. The benefits of the band-gap grading are evaluated when the minimum band-gap is set at the optimum band-gap of 1.38 eV. It is shown that only few graded band-gap profiles exhibit an increase in efficiency, while most of graded profiles reduce performances.
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References
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viii. B. A. Korevaar, A. Halverson, J. Cao, J. Choi, C. Collazo-Davila and W. Huber, “High efficiency CdTe cells using manufacturable window layers and CdTe thickness.†Thin Solid Films,vol. 535, pp. 229–232, 2013.
ix. M Burgelman, P Nollet, S Degrave, “Modelling polycrystalline semiconductor solar cells.†Thin Solid Films 361-362 (2000) 527-532.
x. K. Hsiao, “Electron-reflector strategy for CdTe thin-film solar cells.†Ph.D. dissertation, Colorado State University, 2010.
xi. L. Kosyachenko, “Efficiency of thin-film CdS/CdTe solar cells.†Solar Energy, R. D. Rugescu, Ed., pp. 105–130, 2010.
xii. J. Sites and J. Pan, “Strategies to increaseCdTe solar-cell voltage.†Thin Solid Films, vol. 515, no. 15, pp. 6099–6102, 2007.
xiii. J. Britt and C. Ferekides, “Thin-film CdS/CdTe solar cell with 15.8% efficiency.†Appl. Phys. Lett. 62, 2851 (1993).
xiv. B. A. Korevaar, J. R. Cournoyer, O. Sulima, A. Yakimov, and J. N. Johnson, “Role of oxygen during CdTe growth for CdTe photovoltaic devices.†Prog. Photovoltaics 22, 1040 (2014).
xv. N. W. Duffy, L. M. Peter, and R. L. Wang, “Characterisation of CdS/CdTe heterojunctions by photocurrent spectroscopy and electrolyte electroreflectance/absorbancespectroscopy (EEA/EER).†J. Electroanal. Chem. 532, 207 (2002).
xvi. W. Lane, “A review of the optical band gap of thin film CdSxTe1−x.†Solor Energy Mater. Sol. Cells 90, 1169 (2006).
xvii. B. E. McCandless, G. M. Hanket, D. G. Jensen, and R. W. Birkmire, “Phase behavior in the CdTe-CdS pseudobinary system.†J. Vac. Sci. Technol., A 20, 1462 (2002).
xviii. J. P. Mangalhara, R. Thangaraj, and O. P. Agnihotri, “Structural, Optical and Photoluminescence Properties of Electron Beam Evaporated CdSe1−xTex Films.†Solar Energy Mater., 19, 157-165 (1989).
xix. P. J. Sebastin, “The transport and optical properties of CdSe-CdTe pseudobinary thin films.†Thin Solid Films 245, 132 (1994).
xx. M. Gloeckler and J. R. Sites, “Band-gap grading in Cu(In, Ga)Se2 solar cells.†Journal of Physics and Chemistry of Solids, Volume 66, Issue 11, 1891-1894
xxi. T. Dullweber, G. Hanna, W. Shams-Kolahi, A. Schwartzlander, M. A. Contreras, R. Noufi, and H. W. Schock, “Study of the effect of gallium grading in Cu(In,Ga)Se2.†Thin Solid Films 361-362, 478 (2000).
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Published
2016-06-16
How to Cite
Meng, S., & Yan, Y. (2016). Band Gap Optimization of CdTeSe Thin-Film Solar Cells. JOURNAL OF ADVANCES IN PHYSICS, 12(2), 4213–4218. https://doi.org/10.24297/jap.v12i2.5247
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