Res. Agr. Eng., 2017, 63(1):10-15 | DOI: 10.17221/38/2015-RAE

Temperature changes of I-V characteristics of photovoltaic cells as a consequence of the Fermi energy level shiftOriginal Paper

Martin Libra*, Vladislav Poulek, Pavel Kouřím
Department of Physics, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic

Current voltage (I-V) characteristic of illuminated photovoltaic (PV) cell varies with temperature changes. The effect is explained according to the solid state theory. The higher the temperature, the lower the open-circuit voltage and the higher the short-circuit current. This behaviour is explained on the basis of band theory of the solid state physics. The increasing temperature causes a narrowing of the forbidden gap and a shift of the Fermi energy level toward the centre of the forbidden gap. Both these effects lead to a reduction of the potential barrier in the band diagram of the illuminated PN junction, and thus to a decrease of the photovoltaic voltage. In addition, narrowing of the forbidden gap causes higher generation of electron-hole pairs in the illuminated PN junction and short-circuit current increases.

Keywords: PV cell; energy band structure; PN junction; semiconductor diode; I-V characteristics

Published: March 31, 2017  Show citation

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Libra M, Poulek V, Kouřím P. Temperature changes of I-V characteristics of photovoltaic cells as a consequence of the Fermi energy level shift. Res. Agr. Eng. 2017;63(1):10-15. doi: 10.17221/38/2015-RAE.
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References

  1. Baig H., Sellami N., Mallick T.K. (2015): Performance modeling and testing of a Building Integrated Concentrating Photovoltaic (BICPV) system. Solar Energy Materials & Solar Cells, 134: 29-44. Go to original source...
  2. Barukcic M., Hederic Z., Spoljaric Z. (2014): The estimation of I-V curves of PV panel using manufacturers' I-V curves and evolutionary strategy. Energy Conversion and Management, 88: 447-458. Go to original source...
  3. Carrero C., Ramírez D., Rodríguez J., Platero C.A. (2011): Accurate and fast convergence method for parameter estimation of PV generators based on three main points of the I-V curve. Renewable Energy, 36: 2972-2977. Go to original source...
  4. Ding K., Zhang J., Bian X., Xu J. (2014): A simplified model for photovoltaic modules based on improved translation equations. Solar Energy, 101: 40-52. Go to original source...
  5. Frank H., Snejdar V. (1976): Principy a vlastnosti polovodičových součástek. Prague, SNTL.
  6. Hieslmair H., Istratov A.A., Flink C., McHugo S.A., Weber E.R. (1999): Experiments and computer simulations of iron profiles in p/p+ silicon: segregation and the position of the iron donor level. Physica B, 273-274: 441-444. Go to original source...
  7. Chemisana D., Ibanez M., Rosell J.I. (2011): Characterization of a photovoltaic-thermal module for Fresnel linear concentrator. Energy Conversion and Management, 52: 3234-3240. Go to original source...
  8. Karatepe E., Boztepe M., Colak M. (2007): Development of a suitable model for characterizing photovoltaic arrays with shaded solar cells. Solar Energy, 81: 977-992. Go to original source...
  9. Kittel Ch. (2005): Introduction to Solid State Physics. John Wiley & Sons, Inc.
  10. Kofinas P., Dounis A.I., Papadakis G., Assimakopoulos M.N. (2015): An Intelligent MPPT controller based on direct neural control for partially shaded PV system. Energy and Buildings, 90: 51-64. Go to original source...
  11. Liu G., Nguang S.K., Partridge A. (2011): A general modeling method for I-V characteristics of geometrically and electrically configured photovoltaic arrays. Energy Conversion and Management, 52: 3439-3445. Go to original source...
  12. Orioli A., Di Gangi A. (2013): A procedure to calculate the five-parameter model of crystalline silicon photovoltaic modules on the basis of the tabular performance data. Applied Energy, 102: 1160-1177. Go to original source...
  13. Pikus G.E. (1965): Basic theory of semiconductor devices. Moscow, Nauka.
  14. Poulek V., Libra M. (2010): Photovoltaics. Prague, ILSA.
  15. Strebkov D.S. (2010): Матричные солнечные элементы, Moscow, ВИЭCХ.

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