On the Variability of the Temperature Coefficients of mc-Si Solar Cells with Irradiance

Charly Berthod, Rune Strandberg, Georgi H. Yordanov, Hans-Georg Beyer, Jan O. Odden

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

The temperature sensitivity of silicon solar cells is in general assumed to be constant with irradiance in PV forecasting models, although it has been demonstrated experimentally that this is not true. In this study a theoretical model is established that describes the variation of the temperature coefficients of a silicon solar cell as a function of the irradiance. It is shown that the temperature sensitivity of the solar cell efficiency is decreasing with the irradiance and that the main reason for this behavior
comes from the increase of the open-circuit voltage with light intensity. Moreover, a dependency of the cell´s ideality factor on the irradiance has to be assumed to receive good modelling results that can be confirmed experimentally
Original languageEnglish
Pages (from-to)2-9
Number of pages8
JournalEnergy Procedia
Volume92
Issue numberAugust 2016
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • Temperature coefficients
  • silicon solar cells
  • compensated silicon
  • Irradiance
  • ideality factor

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