Search

Different scales of the inverted pyramid structure are obtained by the acidic nano structure rebuilding (NSR) process, which realizes the mass prodution of high efficiency nanostructured multicrystalline-black silicon (mc-bSi) solar cells with low cost. Firstly, the multi wire slurry sawn (MWSS) of multi crystalline silicon(mc-Si) is investigated through silver metal assisted chemical etching (MACE). Results show that the dihedral angels of inverted pyramid maintain at 54. 7°. The inverted pyramid structured mc-bSi solar cell shows the best efficiency of 18. 62% , with 500 nm inverted pyramid structure by 400 s NSR treatment at 50 °C, and the surface reflectance is 3. 29%. Furthermore, the paper studies the texture property obtained by Ag/Cu MACE method and NSR treatment on diamond wire sawn (DWS) mc-Si. The research results show that the saw marks on DWS mc-Si surface are nearly disappeared. We obtain the optimal DWS mc-Si solar cell with the same size of 600 nm invert pyramid sample, with Voc, Jsc and FF at 640 mV, 37. 35 A/cm2 and 79. 91 % , respectively, and the maximum conversion efficiency is 19. 10% which is higher than that of MWSS mc-bSi solar cell. [ABSTRACT FROM AUTHOR]