高方阻密栅正银浆料的性能研究

发布时间：2018-05-13 22:11

本文选题：方块电阻 + 栅线宽度　；参考：《中南大学》2014年硕士论文

【摘要】：摘要：高方块电阻发射结是晶硅太阳能电池的发展趋势,相对于常规方阻而言,其表面少子复合效应较弱,短波光谱响应好,有助于提升太阳能电池的光电转换效率。然而目前晶硅太阳能电池正面金属化的材料正银浆料基本上只适合于常规方块电阻,因此研究制备一种适合高方阻晶硅太阳能电池的新型国产化正银浆料意义重大。本文紧紧围绕高方阻晶硅太阳能电池正面银电极材料的技术问题,重点研究了有机载体中各组分含量对于正银浆料的性能影响,栅线电极宽度与方块电阻的匹配性以及烧结工艺的优化问题。利用液态磷源扩散法制备不同方块电阻的多晶硅电池片,研究了方块电阻对于短路电流、开路电压、填充因子以及光电转换效率的影响；利用丝网印刷技术,研究了栅线电极宽度对于短路电流、开路电压、填充因子以及光电转换效率的影响；研究了有机载体中各组分的含量对于正银浆料的挥发性能、丝网印刷性能、栅线电极的高宽比、电极的致密度以及光电转换性能的影响；利用红外快速烧结技术,研究了峰值烧结温度,带速及升温速率对于电极的致密度及光电转换性能的影响。研究结果主要如下所列： (1)方块电阻对多晶硅太阳能电池片光电转换性能产生重大影响。随着方块电阻从65Ω/□增加到90Ω/□,短路电流和开路电压分别提升了4.85%、3.23%,填充因子下降了4.15%,光电转换效率先增加后减小,在80Ω/□时达到最高的17.33%。 (2)细栅线电极宽度对于多晶硅电池片的短路电流和填充因子有重大影响。随着网版设计宽度从90μm降低到40μm过程中,短路电流减小了1.98%,填充因子升高了5.15%,光电转换效率先增加后减小。三主栅线设计相对于两主栅而言,由于减小了电流从副栅线传输到主栅线电极的距离,增加了电流的收集效率,短路电流升高了0.25%,填充因子增加了0.25%,光电转换效率得到提升,可达17.45%。 (3)有机载体的组成对于正银浆料的性能有很大影响。本文优选出松油醇、丁基卡必醇及丁基卡必醇醋酸酯三种挥发性能不同的有机溶剂按照60wt%、30wt%、10wt%的比例组成混合溶剂,该混合溶剂在低温下较难挥发,在烘干温度下挥发量较大；增稠剂乙基纤维素的最佳含量为6wt%,此时正银浆料粘度为266Pa·S,印刷所得正面电极轮廓分明,分辨率高；触变剂蓖麻油的最佳含量为3wt%,印刷烧结所得电极高宽比为0.288；正银浆料中有机载体的最佳含量为11wt%,其组成配方为有机溶剂含量89.5wt%,乙基纤维素含量6wt%,蓖麻油含量3wt%,其他添加剂1.5wt%。此时正银浆料粘度为268Pa·S,印刷烧结后所得电极高宽比高,各项性能指标均较优,光电转换效率可达17.58%。 (4)烧结工艺参数对于多晶硅电池片的光电转换性能产生重大影响。本论文优化出的最佳烧结工艺参数为峰值温度800℃,烧结带速660cm/min,升温速率65.7℃/s,此时烧结所得电极致密化好,各项性能指标良好,光电转换效率可达17.75%。
[Abstract]:Abstract: high square resistance emitter is the development trend of crystalline silicon solar cells. Compared with conventional square resistance, the composite effect is weak, and the response of the short wave spectrum is good. It is helpful to improve the photoelectric conversion efficiency of the solar cell. However, the positive silver paste of the crystalline silicon solar cell is basically only suitable for the silicon solar cell. It is of great significance to study and prepare a new type of homemade positive silver paste suitable for high resistance crystalline silicon solar cells. This paper focuses on the technical problems of the silver electrode materials of high square resistance crystalline silicon solar cells, and focuses on the effects of the content of each component in the organic carrier on the performance of the positive silver paste, and the grid wire electrode. The matching of width to block resistance and the optimization of sintering process. The effect of block resistance on short circuit current, open circuit voltage, filling factor and photoelectric conversion efficiency is studied by using liquid phosphorus source diffusion method. The width of grid electrode is studied by screen printing technology. The effects of short circuit current, open circuit voltage, filling factor and photoelectric conversion efficiency were studied. The effects of the content of each component in organic carrier on the volatilization performance of the positive silver paste, the screen printing performance, the height width ratio of the grid electrode, the density of the electrode and the photoelectric conversion performance were studied. The peak burning was studied by the rapid infrared sintering technology. The effects of junction temperature, band velocity and heating rate on the density and photoelectric conversion properties of electrodes are summarized as follows:
(1) the block resistance has a significant influence on the photoelectric conversion performance of the polysilicon solar cell. With the increase of the block resistance from 65 Omega to 90 OMEGA / *, the short circuit current and the open circuit voltage are increased by 4.85%, 3.23%, the filling factor is decreased by 4.15%, the photoelectric conversion efficiency increases first and then decreases, and the highest 17.33%. is reached at 80 OMEGA /.
(2) the width of the fine grid electrode has a significant influence on the short circuit current and the filling factor of the polysilicon battery. With the design width of the net plate reduced from 90 to 40 mu, the short circuit current is reduced by 1.98%, the filling factor is increased by 5.15%, the photoelectric conversion efficiency is increased first and then decreased. The three main grid line design is reduced to the two main gate. The distance of the current from the secondary gate line to the main grid electrode increases the collection efficiency of the current, the short circuit current increases by 0.25%, the filling factor increases by 0.25%, the photoelectric conversion efficiency is improved, up to 17.45%.
(3) the composition of the organic carrier has a great influence on the performance of the positive silver paste. In this paper, three kinds of organic solvents with different volatilization properties of release of pine oil alcohol, Ding Jika and butylacetol acetate are selected according to the proportion of 60wt%, 30wt% and 10wt%. The mixed solvent is more difficult to volatilize at low temperature and the volatilization is larger at the drying temperature. The optimum content of the thickening agent ethyl cellulose is 6wt%, at this time the viscosity of the positive silver paste is 266Pa S, the contour of the positive electrode is clear, the resolution is high, the optimum content of the thixotropic oil is 3wt%, the ratio of the electrode height to width is 0.288, and the optimum content of the airborne body is 11wt% in the positive silver paste, and the composition formula is organic. The content of the solvent is 89.5wt%, the content of ethyl cellulose is 6wt%, the content of castor oil is 3wt%, and the viscosity of the other additive 1.5wt%. is 268Pa. S at this time. The electrode height width ratio is high after the printing sintering, all the performance indexes are better, the photoelectric conversion efficiency can reach 17.58%..
(4) the sintering process parameters have great influence on the photoelectric conversion performance of the polysilicon battery. The optimum sintering parameters are the peak temperature 800 C, the sintering speed 660cm/min and the heating rate of 65.7 /s. The electrode has a good densification, good properties of various properties, and the photoelectric conversion efficiency can reach 17.75%.

【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.4

【参考文献】