基于倒金字塔减反射结构的多晶黑硅及其高效太阳电池
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Investigation on Multi-crystalline Black Silicon and High Efficiency Solar Cell Based on Inverted Pyramid Antireflective Structure
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    摘要:

    采用酸体系的纳米重构(Nano structure rebuilding,NSR)溶液对黑硅纳米结构进行重构,得到不同尺寸的倒金字塔减反射微结构,实现了低成本纳米减反射微结构多晶黑硅(Multicrystallineblack silicon,mcbSi)太阳电池的量产。先用Ag金属催化腐蚀(Metal assisted chemical etching,MACE)对砂浆切割(Multi wire slurry sawn,MWSS)多晶硅片(Multicrystalline silicon,mcSi)进行了研究,发现倒金字塔结构的面夹角均为54.7°,且500 nm尺寸大小的倒金字塔结构黑硅太阳电池的转换效率达到了18.62%,电池的表面反射率降低至3.29%。研究了Ag/Cu双原子催化腐蚀法对金刚线切割(Diamond wire sawn,DWS)多晶硅片的制绒效果,发现多晶硅片表面金刚线切割痕几乎消失不见,采用倒金字塔尺寸为600 nm的DWS片样品制备出了性能最佳的太阳电池,其开路电压Voc为640 mV,短路电流密度Jsc为37.35 A/cm2,填充因子FF为79.91%,最高效率为19.10%,高于同结构的MWSS多晶黑硅太阳电池。

    Abstract:

    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.

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沈鸿烈 蒋晔.基于倒金字塔减反射结构的多晶黑硅及其高效太阳电池[J].南京航空航天大学学报,2017,49(5):744-752

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  • 在线发布日期: 2017-12-06
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