Dispersion Effect on Double-Layer Anti-Reflection Coatings of GaAs Solar Cells

Bai Yiming; Chen Nuofu; Dai Ruixuan; Wang Peng; Peng Changtao

Chin. J. Semicond. > 2006, Volume 27 > Issue 4 > 725-729

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Dispersion Effect on Double-Layer Anti-Reflection Coatings of GaAs Solar Cells

Bai Yiming, Chen Nuofu, Dai Ruixuan, Wang Peng and Peng Changtao

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Abstract:

The dispersion effect of double-layer (DL) anti-reflection coatings (ARCs) is considered. The reflectance of DL SiO₂/ZnSe and the SiO₂/ZnS ARCs as a function of wavelength and weighted reflectance for SiO₂ top anti-reflection coatings with different thicknesses in GaAs solar cells are calculated according to the optical interference matrix. The resulting curves are compared to those without dispersion effect. The results show that the dispersion effect noticeably influences the reflectance of DL ARCs, especially in the spectral range from 300 to 500nm. Moreover, different effects are displayed in different DL ARCs. Compared to those without dispersion effect, the minimal weighted reflectance of SiO₂/ZnSe DL ARCs increases from 1.14% to 1.55%, while that of SiO₂/ZnS DL ARCs decreases from 1.49% to 1.46%.

Key words: dispersion effect, weighted reflectance, double-layer antireflective coatings, GaAs solar cell

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Bai Yiming, Chen Nuofu, Dai Ruixuan, Wang Peng, Peng Changtao. Dispersion Effect on Double-Layer Anti-Reflection Coatings of GaAs Solar Cells[J]. Journal of Semiconductors, 2006, 27(4): 725-729.

Bai Y M, Chen N F, Dai R X, Wang P, Peng C T. Dispersion Effect on Double-Layer Anti-Reflection Coatingsof GaAs Solar Cells[J]. Chin. J. Semicond., 2006, 27(4): 725.