Effect of the circle-grid electrodes on concentrated GaAs solar cell efficiency

Chen Chen Chung, Binh Tinh Tran, Ming Hung Han, Kung Liang Lin, Hung Wei Yu, Yen Teng Ho, Chun Yen Chang, Edward Yi Chang*

*Corresponding author for this work

Research output: Contribution to journalArticle


In this study, we investigate the effect of the shading factor of the front grid pattern on concentrated solar cell efficiency, taking the trade-off between the series resistance of the electrodes and the amount of incident light into consideration. We examine the thermal effect with regard to five different circle-grid electrode patterns of the front contact. The front contacts with different grid patterns affect the characteristics of light-concentrated-type GaAs single-junction solar cells. The device parameters analyzed include the open-circuit voltage (Voc), short-circuit current (Isc), fill factor (FF) and conversion efficiency (η). The results of our study show that for a concentration ratio greater than 60x with AM1.5G, the device with a shading factor of 7.1% has the best cell efficiency of 27.05%, due to the smaller current crowding at the center spot. The results indicate that the conversion efficiency of solar cells can be improved by establishing a compromise between the shading effect and the series resistance effect.

Original languageEnglish
Pages (from-to)963-967
Number of pages5
JournalElectronic Materials Letters
Issue number5
StatePublished - 1 Sep 2014


  • GaAs solar cell
  • circle-grid electrode
  • concentrated
  • shading factor

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    Chung, C. C., Tran, B. T., Han, M. H., Lin, K. L., Yu, H. W., Ho, Y. T., Chang, C. Y., & Chang, E. Y. (2014). Effect of the circle-grid electrodes on concentrated GaAs solar cell efficiency. Electronic Materials Letters, 10(5), 963-967. https://doi.org/10.1007/s13391-014-3201-z