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Optimization of wide angle MgF2/ZnS/Al2O3 passivation and antireflection film for silicon solar cells

WANG LISHENG1,* , CHEN FENGXIANG1

Affiliation

  1. Department of Physics science and technology, Wuhan University of Technology, China

Abstract

Preparation of antireflection film is very important for improving the conversion efficiency of solar cells. In this paper, the MgF2/ZnS/Al2O3 antireflective coating is optimized on the basis of multilayer antireflection coatings theory. In the optimization processes, the influences of the optimal angle, the angles range of incident sunlight, the spectral response of silicon and the distribution of solar spectrum are also included. And the weighted average reflectivity F was used as a standard to evaluate the quality of the antireflection system. Then the results of the MgF2/ZnS/Al2O3 system were compared with that of the MgF2/ZnS/SiO2 system. The computation results show that 30° is the best angle for designing the antireflection coating system and the Al2O3 film can reduce the reflection more effectively than the SiO2 film. The optimal parameters of wide-angle MgF2/ZnS/Al2O3 system are 2 1.38 MgF n = ， 2 119 MgF d nm = ， 2.40 ZnS n = ， 53 ZnS d nm = ， 2 3 1.90 Al O n = ， 2 3 10 Al O d nm = ..

Keywords

Solar cells; Antireflection film; Weighted average reflectivity; Wide-angle.

Submitted at: May 31, 2012
Accepted at: Oct. 30, 2012

Citation

WANG LISHENG, CHEN FENGXIANG, Optimization of wide angle MgF2/ZnS/Al2O3 passivation and antireflection film for silicon solar cells, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 11-12, pp. 929-934 (2012)