Combined with the rough textures which are usually used for fabricating the planar solar cells, textured-microwire（MW） structures（there are MW textures on the tops of MWs） are fabricated. Both simulative and exper...Combined with the rough textures which are usually used for fabricating the planar solar cells, textured-microwire（MW） structures（there are MW textures on the tops of MWs） are fabricated. Both simulative and experimental investigations of the optical properties of Si surface with microwires are carried out and the results show that surfaces of texturedMW structures exhibit lower reflectance in the short wavelength range, but higher reflectance in the long wavelength range than the conventional textured surface. It is also shown, consequently, that the textured-MW structures could absorb more photons in the short wavelength range, which could help improve the performance of the solar cells.展开更多
A new approach for enhancing the conversion efficiency of solar cells is proposed. A surface with columnar structures is employed on the fabrication of multi-crystalline silicon solar cells, for increasing the collect...A new approach for enhancing the conversion efficiency of solar cells is proposed. A surface with columnar structures is employed on the fabrication of multi-crystalline silicon solar cells, for increasing the collection probability of photon-generated minority carriers in the cells. For comparison, three types of surfaces （planar surface, surfaces with columns of 12μm in radius and columns of 9 μm in radius, respectively） are used. It is demonstrated that the cells with columnar structured surfaces have better spectral response and higher efficiencies than the cells with planar surface, while the cells with columns of 9 μm in radius show better spectral response than the cells with columns of 12 μm in radius. However, the cells with columns of 12 μm exhibit higher efficiencies than the cells with columns of 9 μm in radius for their difference in fill factors. Moreover, the effect of the columnar structured surface on the minority carrier collection efficiency is verified with wafers of different minority carrier lifetimes （0.5 μs and 1.0 μs）. This work may significantly consider its potential in the manufacturing of highefficiency solar cells at low cost by using low quality materials.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.U1332205,11274153,11204124,and 11404091)
文摘Combined with the rough textures which are usually used for fabricating the planar solar cells, textured-microwire（MW） structures（there are MW textures on the tops of MWs） are fabricated. Both simulative and experimental investigations of the optical properties of Si surface with microwires are carried out and the results show that surfaces of texturedMW structures exhibit lower reflectance in the short wavelength range, but higher reflectance in the long wavelength range than the conventional textured surface. It is also shown, consequently, that the textured-MW structures could absorb more photons in the short wavelength range, which could help improve the performance of the solar cells.
基金Supported by the National Natural Science Foundation of China under Grant Nos U1332205,11274153,11204124,and 11404091
文摘A new approach for enhancing the conversion efficiency of solar cells is proposed. A surface with columnar structures is employed on the fabrication of multi-crystalline silicon solar cells, for increasing the collection probability of photon-generated minority carriers in the cells. For comparison, three types of surfaces （planar surface, surfaces with columns of 12μm in radius and columns of 9 μm in radius, respectively） are used. It is demonstrated that the cells with columnar structured surfaces have better spectral response and higher efficiencies than the cells with planar surface, while the cells with columns of 9 μm in radius show better spectral response than the cells with columns of 12 μm in radius. However, the cells with columns of 12 μm exhibit higher efficiencies than the cells with columns of 9 μm in radius for their difference in fill factors. Moreover, the effect of the columnar structured surface on the minority carrier collection efficiency is verified with wafers of different minority carrier lifetimes （0.5 μs and 1.0 μs）. This work may significantly consider its potential in the manufacturing of highefficiency solar cells at low cost by using low quality materials.
