丝网印刷在晶体硅太阳电池中的应用研究
发布时间：2019-03-25 16:39
【摘要】：金属化工艺是目前制造常规晶体硅太阳电池最关键的工艺之一,它决定了太阳电池最终的光电转换效率。金属化工艺主要涉及网版、厚膜浆料、印刷和烧结。目前高方阻密栅线设计是提高太阳电池光电转换效率的重要方向之一,网版直接决定了栅线印刷的质量,然而国内外对丝网印刷网版的研究甚少,本论文主要研究网版参数及厚膜浆料印刷(二次印刷)在晶体硅太阳电池上的应用。 随着晶体硅太阳电池技术的发展,丝网印刷成为制备太阳电池必不可少的工艺,其主要工艺目的有： 1)在已形成的p-n结和镀膜后的硅片上进行电极的印刷； 2)顺利导出由光照产生的载流子,实现太阳电池的光电转化； 3)干燥、烧结硅片上的浆料,燃尽浆料中的有机成分,使浆料和硅片形成良好的欧姆接触。 本文主要研究内容如下： 1.由于计算网版下墨量的原理想模型,未将网版参数-感光胶膜厚度,考虑在内,导致计算值与实际实验结果偏差较大。本论文在原理想模型的基础上,建立计算网版下墨量的新模型,并推导出计算网版下墨量的具体数学表达式,通过设计实验求出了数学表达式中的粘结系数,同时也研究分析了浆料流变性对粘结系数的影响。 2.研究网版工艺对晶体硅太阳电池性能的影响,主要包括感光胶厚度、网版厚度,对多晶硅太阳电池性能的影响,实验结果发现感光胶膜厚并非越厚越好,而网版厚度的降低更有利于电池性能的提升；感光胶涂布均匀性试验,实验得出感光胶涂布次数与网版厚度,以及涂布次数与网版表面粗糙度的关系；然后比较了不同的制版方式和不同的网布材料对电池性能的影响。 3.在形成电极Ag-Si接触的基础上,优化了烧结工艺,并研究了峰值烧结温度对电池填充因子FF的影响；优化了刮条的硬度并设计了多角度刮刀；然后多角度研究了2代二次印刷,分别对比了栅线烧结后的高宽比、栅线的SEM图、电池的I-V特性曲线图、栅线电阻及接触电阻值、电池的PL图,得出第2代二次印刷,比单次印刷电池的接触电阻降低了4mΩ/cm2,栅线电阻降低了0.11Ω/cm,最终电池的转换效率有0.3%的提升。 4.在接触电阻形成的原理方面,二次印刷与电镀电极很相似,本论文在相同的栅线遮光面积、不同的栅线间距两种情况下,研究了电镀电极和丝网印刷电极,实验结果发现,太阳电池经过电镀电极在串联电阻方面具有优势,这与二次印刷非常相似,同时也进一步验证了二次印刷的可靠性。
[Abstract]:The metallization process is one of the most critical processes in the manufacture of conventional crystalline silicon solar cells, which determines the final photoelectric conversion efficiency of the solar cell. The metallization process mainly involves screen printing, thick film sizing, printing and sintering. At present, the design of the high-square grid line is one of the important directions to improve the photoelectric conversion efficiency of the solar cell, the quality of the grid line printing is directly determined by the screen, This paper mainly studies the application of screen parameters and thick film printing (secondary printing) on crystalline silicon solar cells. With the development of crystalline silicon solar cell technology, screen printing has become an essential technology for preparing solar cell, and its main process purpose 1) conducting the electrode on the formed p-n junction and the coated silicon wafer; printing;2) the smooth export of the light produced by the light the generation of a solar cell by the generation of a carrier (3) drying, sintering the slurry on the silicon wafer, and burning out the organic components in the slurry to form the slurry and the silicon wafer; Good ohmic contact. The main contents of the study are as follows:1. The calculation value is caused by the calculation of the principle of the ink amount under the screen plate, the thickness of the screen parameter and the photosensitive film is not taken into consideration, Based on the principle and model, the paper establishes a new model for calculating the amount of ink in the net plate, and derives the specific mathematical expression for calculating the amount of ink in the net plate, which is obtained by the design experiment. The adhesion coefficient in the mathematical expression is also studied and analyzed. 2. The effect of the screen process on the performance of the crystalline silicon solar cell is studied. The effect of the screen process on the performance of the crystalline silicon solar cell is mainly composed of the thickness of the photosensitive adhesive, the thickness of the screen and the effect on the performance of the polycrystalline silicon solar cell. The method is beneficial to the improvement of the performance of the battery, and the sensitization glue coating uniformity test is carried out to obtain the relation between the number of coating times of the photosensitive glue and the screen thickness, the number of coating times and the surface roughness of the screen, and then the different plate-making modes and the differences are compared. 3. On the basis of forming the contact of Ag-Si, the sintering process is optimized, and the influence of the peak sintering temperature on the filling factor FF of the battery is studied. The hardness of the scraping strip is optimized and the multi-angle scraper is designed. and then, two-generation secondary printing is carried out at a multi-angle, the aspect ratio of the grid line sintering, the SEM image of the grid line, the I-V characteristic graph of the battery, the grid line resistance and the contact resistance value, the PL diagram of the battery are compared, the second generation secondary printing is obtained, the contact resistance of the second generation secondary printing is reduced by 4 m惟/ cm2, The grid line resistance is reduced by 0.11惟/ cm, and finally The conversion efficiency of the battery is improved by 0.3%.4. In the principle of the contact resistance formation, the secondary printing is similar to that of the electroplating electrode. In this paper, the electric power is studied under the two conditions of the same grid line shading area and different grid line spacing. the experimental results show that the solar cell has advantages in the series resistance through the plating electrode, which is very similar to the secondary printing,
【学位授予单位】：江南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.41
本文编号：2447140
[Abstract]:The metallization process is one of the most critical processes in the manufacture of conventional crystalline silicon solar cells, which determines the final photoelectric conversion efficiency of the solar cell. The metallization process mainly involves screen printing, thick film sizing, printing and sintering. At present, the design of the high-square grid line is one of the important directions to improve the photoelectric conversion efficiency of the solar cell, the quality of the grid line printing is directly determined by the screen, This paper mainly studies the application of screen parameters and thick film printing (secondary printing) on crystalline silicon solar cells. With the development of crystalline silicon solar cell technology, screen printing has become an essential technology for preparing solar cell, and its main process purpose 1) conducting the electrode on the formed p-n junction and the coated silicon wafer; printing;2) the smooth export of the light produced by the light the generation of a solar cell by the generation of a carrier (3) drying, sintering the slurry on the silicon wafer, and burning out the organic components in the slurry to form the slurry and the silicon wafer; Good ohmic contact. The main contents of the study are as follows:1. The calculation value is caused by the calculation of the principle of the ink amount under the screen plate, the thickness of the screen parameter and the photosensitive film is not taken into consideration, Based on the principle and model, the paper establishes a new model for calculating the amount of ink in the net plate, and derives the specific mathematical expression for calculating the amount of ink in the net plate, which is obtained by the design experiment. The adhesion coefficient in the mathematical expression is also studied and analyzed. 2. The effect of the screen process on the performance of the crystalline silicon solar cell is studied. The effect of the screen process on the performance of the crystalline silicon solar cell is mainly composed of the thickness of the photosensitive adhesive, the thickness of the screen and the effect on the performance of the polycrystalline silicon solar cell. The method is beneficial to the improvement of the performance of the battery, and the sensitization glue coating uniformity test is carried out to obtain the relation between the number of coating times of the photosensitive glue and the screen thickness, the number of coating times and the surface roughness of the screen, and then the different plate-making modes and the differences are compared. 3. On the basis of forming the contact of Ag-Si, the sintering process is optimized, and the influence of the peak sintering temperature on the filling factor FF of the battery is studied. The hardness of the scraping strip is optimized and the multi-angle scraper is designed. and then, two-generation secondary printing is carried out at a multi-angle, the aspect ratio of the grid line sintering, the SEM image of the grid line, the I-V characteristic graph of the battery, the grid line resistance and the contact resistance value, the PL diagram of the battery are compared, the second generation secondary printing is obtained, the contact resistance of the second generation secondary printing is reduced by 4 m惟/ cm2, The grid line resistance is reduced by 0.11惟/ cm, and finally The conversion efficiency of the battery is improved by 0.3%.4. In the principle of the contact resistance formation, the secondary printing is similar to that of the electroplating electrode. In this paper, the electric power is studied under the two conditions of the same grid line shading area and different grid line spacing. the experimental results show that the solar cell has advantages in the series resistance through the plating electrode, which is very similar to the secondary printing,
【学位授予单位】：江南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.41
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