网版参数对“SE+PERC”双面单晶硅太阳电池电性能影响的研究

STUDY ON THE EFFECT OF SCREEN PARAMETERS ON THE ELECTRICAL PROPERTIES OF “SE+PERC” BIFACIAL MONO-SILICON SOLAR CELLS

针对“SE+PERC”双面单晶硅太阳电池制备过程中丝网印刷环节的网版参数,通过设计不同的网纱厚度、聚酰亚胺(PI)膜厚度及网版开口宽度匹配实验,研究了不同匹配方案对单片“SE+PERC”双面单晶硅太阳电池正面栅线银浆耗量及电性能的影响。研究结果表明:单片太阳电池正面栅线的银浆耗量随着网纱厚度、PI膜厚度及网版开口宽度的增加而升高;当网纱厚度为17μm、PI膜厚度为8μm、网版开口宽度为17μm时,单片太阳电池正面栅线的银浆耗量最低,仅为0.0584 g,光电转换效率为22.808%,该匹配方案可最大限度地降低太阳电池的生产成本;当网纱厚度为17μm、PI膜厚度为10μm、网版开口宽度为18μm时,单片太阳电池正面栅线的银浆耗量为0.0646 g,光电转换效率为22.898%;当网纱厚度为19μm、PI膜厚度为10μm、网版开口宽度为20μm时,单片太阳电池正面栅线的银浆耗量为0.0699 g,光电转换效率最高,为22.961%,该匹配方案可最大限度地提升太阳电池的光电转换效率。

In this paper,aiming at the screen parameters of the screen printing process in the preparation process of“SE+PERC”bifacial mono-silicon solar cells,by designing different mesh thicknesses,polyimide(PI) film thicknesses and screen opening width matching experiments,the effects of different matching schemes on the silver paste consumption of the front grid lines and electrical properties of “SE+PERC”bifacial monosilicon solar cells are studied.The research results show that the silver paste consumption of the front grid line of a single solar cell increases with the increase of mesh thickness,PI film thickness and screen opening width.When the mesh thickness is 17 μm,the PI film thickness is 8 μm,the screen opening width is 17 μm,the silver paste consumption for the front grid line of a single solar cell is the lowest,only 0.0584 g,and the photoelectric conversion efficiency is 22.808%,this matching scheme can minimize the production cost of solar cell.When the mesh thickness is 17 μm,the PI film thickness is 10 μm,the screen opening width is 18 μm,the silver paste consumption of the front grid line of a solar cell is 0.0646 g,the photoelectric conversion efficiency is 22.898%.When the of the mesh thickness is 19 μm,the PI film thickness is 10 μm,the screen opening width is 20 μm,the silver paste consumption of the front grid line of a single solar cell is 0.0699 g,the photoelectric conversion efficiency is the highest,which is 22.961%,and this matching scheme can maximize the photoelectric conversion efficiency of the solar cells.