摘要
A design of ultrathin crystalline silicon solar cells patterned withα-NaEr0.2Y0.8F4 upconversion nanosphere(NSs)arrays on the surface was proposed.The light trapping performance ofα-NaEr0.2Y0.8F4 NSs with different ratios of sphere diameter to sphere pitch was systematically studied by COMSOL Multiphysics.The influence of different NS diameters and ratio to the average optical absorption of ultrathin crystalline silicon solar cell was calculated,as well as the short circuit current densities.The results show that the average optical absorption of solar cells with 2.33μm silicon covered byα-NaEr0.2Y0.8F4 NSs of 100 nm in diameter and 5.2 in ratio has improved by 8.5%compared to planar silicon solar cells with the same thickness of silicon.The light trapping performance of different thicknesses of silicon solar cells with the optimized configuration of NSs was also discussed.The results indicate that our structure enhances the light absorption.The presented model will be the basis for further simulations concerning frequency upconversion ofα-NaEr0.2Y0.8F4 materials.
A design of ultrathin crystalline silicon solar cells patterned with α-NaEr0.2Y0.8F4 upconversion nanosphere（NSs） arrays on the surface was proposed. The light trapping performance ofα-NaEr0.2Y0.8F4 NSs with different ratios of sphere diameter to sphere pitch was systematically studied by COMSOL Multiphysics. The influence of different NS diameters and ratio to the average optical absorption of ultrathin crystalline silicon solar cell was calculated, as well as the short circuit current densities. The results show that the average optical absorption of solar cells with 2.33 μm silicon covered by α-NaEr0.2Y0.8F4 NSs of 100 nm in diameter and 5.2 in ratio has improved by 8.5% compared to planar silicon solar cells with the same thickness of silicon. The light trapping performance of different thicknesses of silicon solar cells with the optimized configuration of NSs was also discussed. The results indicate that our structure enhances the light absorption. The presented model will be the basis for further simulations concerning frequency upconversion of α-NaEr0.2Y0.8F4 materials.
基金
supported by the National Defense Science and Technology Innovation Special Zone
the Training Programme Fund for Talents of Hebei Province(A201902010)
the Natural Science Fund of Hebei Province(F2018203263)
the Educational Commission of Hebei Province(ZD2016054)
Graduate innovative funding program of Hebei Province(CXZZBS2018057).
