Skip to main content Accessibility help
×
Home

Enhanced Light-trapping in Solar Cells by Directional Selective Optical Filters

  • Carolin Ulbrich (a1), Thomas Kirchartz (a2) and Uwe Rau (a3)

Abstract

Directional selective optical filters increase the photon confinement of solar cells with a Lambertian light-trapping scheme. These filters restrict the transmission of incoming sunlight to a cone of limited acceptance angle. This paper models the efficiency gain or loss caused by an ideal directional and energy selective filter on top of a solar cell, and compares it to a cell with Lambertian surface and a planar absorber. The enhancement of light trapping by the directional filter is illustrated by the enhancement of the quantum efficiency of normally incident light. Simulations of the annual yield demonstrate that the improved light trapping results in an overall energy gain of more than 10 % for a tracked system.To achieve this gain at the equator,a filter with small acceptance angle of 5 ° that is active below the threshold energy ˜1.5 eV has to used.

Copyright

References

Hide All
1 Brendel, R. and Queisser, H. J. Sol Ener. Mat. Sol. Cells 29, 397401 (1993).
2 Yablonovitch, E. J. Opt. Soc. 72, 899907 (1982).
3 Miñano, J. C., in Physical Limitations to Photovoltaic Solar Energy Conversion, edited by Luque, A. and Araújo, G. L., (Hilger, Bristol, UK, 1990) pp. 5083.
4 Ulbrich, C. Fahr, S. Peters, M. Üpping, J., Kirchartz, T. Rockstuhl, C. Goldschmidt, J. C. Löper, P., Wehrspohn, R. Gombert, A. Lederer, F. and Rau, U. Proc. SPIE, Vol. 7002, 70020A (2008).10.1117/12.781248
5 Basore, P. A. and Clugston, D. A. “PC1D Version 5.1” (1997).
6 Green, M. A. Prog. Photovolt.: Res. Appl. 10, 235241 (2002).
7 Hulstrom, R. Bird, R. and Riordan, C. Sol. Cells 15, 365391 (1985).
8 Shockley, W. and Queisser, H. J. J. Appl. Phys. 32, 510519 (1961)10.1063/1.1736034
9 Reda, I. and Andreas, A.Solar position algorithm for solar radiation application”, National Renewable Energy Laboratory (NREL) (2003).
10 Bird, R. and Riordan, C.Simple solar spectral model for direct and diffuse irradiance on horizontal and tilted planes at the earth's surface for cloudless atmospheres”. Solar Energy Research Institute (1984).

Keywords

Enhanced Light-trapping in Solar Cells by Directional Selective Optical Filters

  • Carolin Ulbrich (a1), Thomas Kirchartz (a2) and Uwe Rau (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed