CN103000248A - Solar cell front sliver paste powder adaptable to high sheet resistance and shallow junction - Google Patents

Solar cell front sliver paste powder adaptable to high sheet resistance and shallow junction Download PDF

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CN103000248A
CN103000248A CN 201210446535 CN201210446535A CN103000248A CN 103000248 A CN103000248 A CN 103000248A CN 201210446535 CN201210446535 CN 201210446535 CN 201210446535 A CN201210446535 A CN 201210446535A CN 103000248 A CN103000248 A CN 103000248A
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powder
particle size
glass frit
silver
average particle
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CN 201210446535
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CN103000248B (en )
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戈士勇
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江苏瑞德新能源科技有限公司
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The invention relates to solar cell front sliver paste powder adaptable to high sheet resistance and shallow junction. The powder comprises, by weight percent, 50-75% of coarse sliver powder 2-5 micrometers in average particle size, 20-45% of fine sliver powder 0.5-2 micrometers in average particle size, 1-9% of glass powder, and 0.1-3% of additive. The components are added up to 100% by weight percent. Both the glass powder and the additive are in twin-peak particle size distribution. Compared with the prior art, the front sliver paste powder is optimized by powder gradation. The glass powder and the additive are proper in particle size. Voids between the coarse and fine sliver powders can be effectively filled with the glass powder and the additive. After sintering, silver islands are small and evenly distributed, can form fine orphic contacts and are fine in appearance. The glass powder has moderate activity and does not disrupt P-N junctions. The front sliver paste made from the powder is suitable for sintering on shallow-junction silicon cells.

Description

一种适应高方阻浅结的太阳能电池正银浆料用粉体料技术领域[0001] 本发明涉及一种电子浆料,具体涉及一种适应高方阻浅结的太阳能电池正银浆料用粉体料。 An adaptation of a high sheet resistance shallow junction solar cell positive silver paste [0001] The present invention relates to an electronic technical field of powder material paste, particularly, to a solar cell positive silver paste accommodate high square resistance of the shallow junction material with a powder. 背景技术[0002] 太阳能电池是一种能将太阳能转化为电能的半导体器件。 [0002] The solar cell is a solar energy into electrical energy capable of a semiconductor device. 随着光伏行业的发展, 高方阻浅结逐渐成为了太阳能电池片的发展趋势之一。 With the development of photovoltaic industry, high sheet resistance is becoming one of the shallow junction solar cells of the development trend. 高方阻浅结结构的硅太阳能电池能够降低太阳能电池表面的少数载流子复合速度以及提高短波响应,从而·提高电池片的光电转化效率。 High square resistance of a shallow junction silicon solar cell structure capable of reducing the minority carrier recombination velocity of the solar cell surface and to increase a short response, thereby improving the photoelectric conversion efficiency of the battery-sheet. 实现电池片的高方阻浅结一般要求用来制作太阳能电池电极的正银浆料具有高烧结温度。 Solar cells achieve a high sheet resistance is generally required for shallow junction solar cell produced positive electrode silver paste having a high sintering temperature. 普通银浆用在具有浅结结构的硅电池片上烧结时多会发生旁路结现象,引起漏电流,并且电极的接触电阻大,会降低了电流的输出特性,进而降低了电池的性能。 Common silver paste used on a shallow junction silicon solar cell having a configuration of a multi-junction bypass phenomenon occurs during sintering, causing leakage current, and the contact resistance of the electrode is large, reduce the output current characteristic, thereby reducing the performance of the battery. 因此有必要在正银浆料的配方上进行调整,以适应具有浅结结构的硅电池片的烧结要求。 It is therefore necessary to adjust the formulation in a positive silver paste to accommodate a sintered silicon solar cell is required to have a shallow junction structure. 由于正银浆料中的溶剂、有机载体和有机助剂在电池片的低温烘干阶段中基本都被除去,因此这些组分对正银浆料的烧结温度基本不产生影响,而对正银浆料的烧结温度产生影响的因素主要来源于银粉、玻璃粉和无机添加剂。 Since the positive silver compound in a solvent, an organic vehicle and the organic additives are substantially removed at a low temperature in the drying stage of the cell sheets, these components are not produced at sintering temperatures substantially positive impact silver paste, while the positive silver factors affecting the sintering temperature of the slurry mainly from silver, glass frit and inorganic additives. 因此,开发一种由银粉、玻璃粉和无机添加剂组成的适应高方阻浅结的太阳能电池正银浆料用粉体料非常必要。 Thus, the development of a silver powder, glass frit and an inorganic additive adapted to a high sheet resistance of the shallow n junction solar cell with a silver paste material powder is necessary. [0003]目前,太阳能电池正银浆料多采用单一粒径的银粉为导电体,其缺点为银粉的烧结活性单一;若使用大粒径银粉,则烧结后银膜结构不够致密,电极与硅基板之间的接触电阻大;若使用小粒径银粉,则烧结中银粉易过度流延,且需要高银粉填充量方能达到电极导电率的指标,制备成本高。 [0003] Currently, solar cells use more positive silver silver paste single particle size of a conductive material, has the disadvantage that a single silver powder sintering activity; if large silver particle, a silver film structure after sintering not dense enough, the electrodes and the silicon the contact resistance is large between the substrate; if a small particle diameter silver powder, silver powder in the sintering excessively easy to cast, and requires a high loading of silver electrodes in order achieve the target conductivity, high production costs. 相比之下,使用双粒径或多粒径分布的银粉的混合物作为正银浆料的导电体,如申请号为201210030266.1的中国专利中公开的一种使用O.1-1Mm超细银粉、l-3Mm细银粉和3-6Mm的粗银粉的混合物作为导电体的正银浆料,由于其中粒径大小不同的银粉具有不同的烧结活性,因此该正银浆料烧结后具有较好的电极外观。 In contrast, using a mixture of bis particle size distribution of the silver or the silver paste as the conductive material of the positive, such as Chinese Patent Application No. 201210030266.1 disclosed a silver powder used O.1-1Mm, l-3Mm mixture of fine silver and silver 3-6Mm coarse positive silver paste as the conductive member, because of which the silver powder having a different particle size different sintering active, so that the silver paste is sintered positive electrode having good Exterior. 但是,目前所用的正银浆料粉体料基本只从银粉的角度进行粉体级配的优化;而实际上,玻璃粉以及无机添加剂均影响正银浆料的烧结。 However, the currently used positive material substantially only the silver paste powder powder optimized gradation from the perspective of silver; in fact, the glass frit and the inorganic additives are positive effect of sintering of silver paste. 发明内容[0004] 本发明需要解决的技术问题在于克服现有技术的不足,提供一种适应高方阻浅结的太阳能电池正银浆料用粉体料。 [0004] The present invention is a technical problem to be solved is to overcome the shortcomings of the prior art, to provide an adaptive high square resistance of the solar batteries are shallow junctions with the silver paste material powder. [0005] 本发明需要解决的技术问题是通过以下技术方案实现的:一种适应高方阻浅结的太阳能电池正银浆料用粉体料,其组成及其重量百分数为:平均粒径为2-5Mm的粗银粉50-75%、平均粒径为O. 5-2Mm的细银粉20_45%、玻璃粉1_9%、添加剂O. 1-3% ;其中,各组分的重量百分数之和为100%。 [0005] The present invention requires technical problem is achieved by the following technical solutions: A high square resistance adaptation shallow junction solar cell with a silver paste positive material powder, the composition and weight percentage: average particle diameter the crude silver 2-5Mm 50-75%, an average particle diameter of the fine silver O. 5-2Mm 20_45%, 1_9% glass powder, additives O. 1-3%; wherein the weight percentages of each component and is 100%. [0006] 为了进一步提高烧结后银膜的致密性,优选的技术方案可以是,上述粗细银粉均为球形或类球形,振实密度>5. 5g/cm3。 [0006] To further enhance the densification of the sintered silver films, may be preferred technical solution, the above-described thickness are spherical or spherical silver powder, tap density> 5. 5g / cm3. 该高振实密度银粉能紧密地堆积,保证银膜的导电性。 The high tap density of silver powder can be closely packed to ensure conductive silver film. [0007] 为了避免玻璃粉在高温烧结时在硅基板上过度流延而导致块银的形成,该玻璃粉须具有适中的软化温度。 [0007] In order to avoid excessive sintering at a high temperature glass frit cast on a silicon substrate results in the formation of a block of silver, the glass frit must have a softening temperature moderate. 优选的技术方案可以是,上述玻璃粉的软化点为380_480°C。 Preferred technical solution, the softening point of the glass frit is 380_480 ° C. [0008] 进一步优选的技术方案可以是,上述玻璃粉的组成及其重量百分数为:氧化铅65-85%、氧化铝O. 5-5%、氧化硅1-10%、氧化锌1_10%、氧化镁1-10% ;其中,玻璃粉各组分重量百分数之和为100%。 [0008] In a further preferred technical solution, the weight of the glass frit composition and a percent: 65-85% lead oxide, alumina, O. 5-5%, 1-10% silicon oxide, zinc oxide 1_10% MgO 1-10%; wherein the weight percentages of each component of the glass frit is 100%. [0009] 为了有效地实现玻璃粉对上述粗细银粉的有效粘合,进一步优选的技术方案可以是,上述玻璃粉具有双峰态粒径分布,平均粒径小于O. 5Mm的细玻璃粉重量上占10-35%,余量为平均粒径为O. 5-5Mm的粗玻璃粉,粗玻璃粉和细玻璃粉的重量百分数之和为100%。 [0009] In order to effectively achieve effective adhesion of the frit above the thickness of the silver, may be a further preferred aspect, the glass frit having a bimodal particle size distribution, average particle size smaller than the fine glass frit by weight 5Mm is O. accounted for 10-35%, the balance being an average particle size of coarse glass frit O. 5-5Mm, percentages by weight of the coarse and fine glass frit and the glass frit is 100%. 因此,粗玻璃粉可以分散在上述的粗铝银粉之间的孔隙中,而细玻璃粉可以分散在上述的细银粉之间的孔隙中,故采用该粗细玻璃粉的混合物可有效粘接粗细银粉,避免高温烧结中块银的形成。 Thus, a mixture coarse glass frit may be dispersed in the pores between the coarse aluminum silver, the thin glass frit may be dispersed in the pores between the fine silver powder, so the use of the effective thickness of an adhesive glass frit silver thickness , to avoid the formation of high-temperature sintering of the silver in the block. [0010] 为了促进银膜和硅基板之间欧姆接触的形成,可在该正银浆料用粉体料中使用少量的添加剂,以促进烧结。 [0010] In order to facilitate the formation of an ohmic contact between the silver film and the silicon substrate, can feed a small amount of additives in the powder of positive silver paste, to facilitate sintering. 优选的技术方案可以是,上述添加剂为铜、锡、锌、镍金属单质中的一种或几种。 Preferred technical solution can be the additive is copper, tin, zinc, nickel elemental metal is one or several. 银粒子可以与添加的金属单质之间形成合金,熔化后穿透减反射膜,从而促进了银粒子的扩散,形成欧姆接触,降低串联电阻。 May be formed between the silver particles added to the single metal alloy, the melting penetrates the antireflective film, thereby promoting the diffusion of silver particles, forming ohmic contacts to reduce the series resistance. [0011] 进一步优选的技术方案为,上述添加剂具有双峰态粒径分布,平均粒径小于O. 5Mffl 的添加剂重量上占10-35%,余量为平均粒径为O. 5-5Mm的添加剂,两种不同粒径的添加剂的重量百分数之和为100%。 [0011] A further preferred aspect of the additives have a bimodal particle size distribution, the average particle size accounts for less than 10 to 35% by weight O. 5Mffl of the additive, the balance being an average particle size of O. 5-5Mm additives, the percentages by weight of the two additives of different particle sizes up to 100%. 该具有双峰态粒径分布的添加剂能有效地填充粗细银粉和粗细玻璃粉之间的孔隙,使得穿透减反射膜的过程更加均匀,所得的电极的电性能更加均匀。 The additive having a bimodal particle size distribution is effective to fill the voids between the thickness of silver powder and glass frit thickness, so that the antireflection film penetrates more uniform process, the electrical properties of the resultant electrode is more uniform. [0012] 与现有技术相比,本发明的优点和有益效果在于:本发明适应高方阻浅结的太阳能电池正银浆料用粉体料采用两种不同的高振实银粉搭配使用,烧结后电极结构致密,外观一致性好;玻璃粉的活性合适,穿透减反射膜后不会发生PN结的击穿而引起旁路结现象,同时玻璃粉采用双粒径分布,能有效地粘接粗细银粉,烧结冷却过程中形成的银岛尺寸较小,且分布均匀,故能使银膜与硅基板产生良好的欧姆接触;添加剂也能均匀且有效地改善了银膜与硅基板之间的欧姆接触;该粉体料中玻璃粉的使用量较常规正银浆料用玻璃粉的用量少,且能达到工业应用所需的附着力,故所得的电极及栅线的电阻小,光电转化效率高。 [0012] Compared with the prior art, the advantages and benefits of the present invention wherein: The present invention accommodates high square resistance of the solar batteries are shallow junctions with the silver paste material powder using two different high tap with the use of silver powder, sintering electrode dense structure, the appearance of good consistency; glass frit suitable activity, the PN junction of the shunt caused by the breakdown phenomenon does not occur after penetrating the anti-reflection film, while the dual glass powder the particle size distribution can be effectively bonded thickness of silver, silver island size of the sintered formed during cooling is small, and distribution, it can make the silver film and the silicon substrate to produce a good ohmic contact; additive can be uniformly and effectively improved between the silver film and the silicon substrate the ohmic contact; the amount of the glass frit powder feed than with conventional positive silver paste with less glass frit, and can achieve the required industrial adhesion applications, and therefore the resulting low resistance and the gate electrode lines, optical high conversion efficiency. 该粉体料适合制备用于在具有浅结结构的硅电池片上烧结的正银浆料。 This powder is suitable for preparing sintered material on a shallow junction silicon solar cell having a structure of positive silver paste. 具体实施方式[0013] 下面结合实施例,对本发明的具体实施方式做进一步描述。 DETAILED DESCRIPTION [0013] Example embodiments in conjunction with the following, specific embodiments of the present invention are further described. 以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。 The following examples serve only to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of the invention. [0014] 实施例1一种适应高方阻浅结的太阳能电池正银浆料用粉体料,其组成及其重量百分数为: 平均粒径为2-5Mm的粗银粉50%、平均粒径为O. 5_2Mm的细银粉45%、玻璃粉4. 9%、添加剂O. 1%。 Example 1 A solar cell accommodate high square resistance shallow junction [0014] The positive silver paste with powder material, its composition and its weight percentage: average particle size of the coarse silver 2-5Mm 50% average particle diameter O. 5_2Mm fine silver powder 45% 4.9% glass powder, additives O. 1%. 其中,粗细银粉均为球形或类球形,振实密度>5. 5g/cm3 ;玻璃粉的软化点为380-480°C,玻璃粉的组成及其重量百分数为:氧化铅65%、氧化铝5%、氧化硅10%、氧化锌10%、氧化镁10% ;玻璃粉具有双峰态粒径分布,平均粒径小于O. 5Mm的细玻璃粉重量上占10%,平均粒径为O. 5-5Mm的粗玻璃粉占90% ;添加剂为锡单质,具有双峰态粒径分布,平均粒径小于O. 5Mm的添加剂重量上占10%,平均粒径为O. 5-5Mm的添加剂占90%。 Among them, the thickness of the silver powder are spherical or spherical, a tap density> 5 5g / cm3; the softening point of the glass frit is 380-480 ° C, the glass frit composition and the weight percentages of: 65% lead oxide, aluminum oxide 5%, 10% silica, 10% zinc oxide, 10% magnesium oxide; glass frit having a bimodal particle size distribution, the average particle size of less than 10% by weight of the glass frit 5Mm O. fine average particle size of O . 5-5Mm coarse glass frit 90%; elemental additive is tin, having a bimodal particle size distribution, the average particle size of less than 10% of the weight of the additive 5Mm O., an average particle diameter of O. 5-5Mm additives accounted for 90%. [0015] 实施例2一种适应高方阻浅结的太阳能电池正银浆料用粉体料,其组成及其重量百分数为:平均粒径为2-5Mm的粗银粉75%、平均粒径为O. 5_2Mm的细银粉20%、玻璃粉2%、添加剂3%。 [0015] Example 2 an adaptation of the solar cell positive silver paste high square resistance shallow junctions with powder material, and its composition by weight percentage: average particle size of the coarse silver 2-5Mm 75% average particle diameter fine silver of 20% O. 5_2Mm, 2% glass powder, 3% of additives. 其中,粗细银粉均为球形或类球形,振实密度>5. 5g/cm3 ;玻璃粉的软化点为380-480°C,玻璃粉的组成及其重量百分数为:氧化铅85%、氧化招5%、氧化娃1%、氧化锌4%、氧化镁5% ; 玻璃粉具有双峰态粒径分布,平均粒径小于O. 5Mm的细玻璃粉重量上占35%,平均粒径为O. 5-5Mm的粗玻璃粉占65% ;添加剂为铜单质,具有双峰态粒径分布,平均粒径小于O. 5Mm的添加剂重量上占35%,平均粒径为O. 5-5Mm的添加剂占65%。 Among them, the thickness of the silver powder are spherical or spherical, a tap density> 5 5g / cm3; the softening point of the glass frit is 380-480 ° C, the glass frit composition and the weight percentages of: 85% lead oxide, oxide trick 5%, 1% baby oxide, zinc oxide, 4%, 5% magnesium oxide; glass frit having a bimodal particle size distribution, the average particle size of less than 35% by weight of the glass frit 5Mm O. fine average particle size of O . 5-5Mm coarse glass frit 65%; elemental additive is copper, having a bimodal particle size distribution, the average particle size of less than 35% of the weight of the additive 5Mm O., an average particle diameter of O. 5-5Mm additives accounted for 65%. [0016] 实施例3一种适应高方阻浅结的太阳能电池正银浆料用粉体料,其组成及其重量百分数为:平均粒径为2-5Mm的粗银粉62%、平均粒径为O. 5_2Mm的细银粉27%、玻璃粉9%、添加剂2%。 [0016] Example 3 an adaptation of the solar cell positive silver paste high square resistance shallow junctions with powder material, and its composition by weight percentage: average particle size of the coarse silver 2-5Mm 62%, an average particle diameter fine silver of 27% O. 5_2Mm, 9% glass powder, 2% of additives. 其中,粗细银粉均为球形或类球形,振实密度>5. 5g/cm3 ;玻璃粉的软化点为380-480°C,玻璃粉的组成及其重量百分数为:氧化铅81%、氧化铝2%、氧化硅9%、氧化锌1%、氧化镁7% ; 玻璃粉具有双峰态粒径分布,平均粒径小于O. 5Mm的细玻璃粉重量上占15%,平均粒径为O. 5-5Mm的粗玻璃粉占85% ;添加剂为镍单质,具有双峰态粒径分布,平均粒径小于O. 5Mm的添加剂重量上占20%,平均粒径为O. 5-5Mm的添加剂占80%。 Among them, the thickness of the silver powder are spherical or spherical, a tap density> 5 5g / cm3; the softening point of the glass frit is 380-480 ° C, the glass frit composition and the weight percentages of: 81% lead oxide, aluminum oxide 2%, 9% of silicon oxide, zinc oxide, 1%, 7% MgO; 15% glass frit having a bimodal particle size distribution, the average particle size of less than O. 5Mm fine glass frit by weight, an average particle diameter of O . 5-5Mm coarse glass frit 85%; elemental nickel additive, having a bimodal particle size distribution, the average particle size of less than 20% O. 5Mm weight of the additive, the average particle diameter of O. 5-5Mm additives accounted for 80%. [0017] 实施例4一种适应高方阻浅结的太阳能电池正银浆料用粉体料,其组成及其重量百分数为:平均粒径为2-5Mm的粗银粉66%、平均粒径为O. 5_2Mm的细银粉32%、玻璃粉1%、添加剂1%。 [0017] Example 4 an adaptation high square resistance of the solar batteries are shallow junctions with the silver paste material powder, the composition and weight percentage: average particle size of the coarse silver 2-5Mm 66% average particle diameter O. 5_2Mm to 32% of fine silver powder, glass powder 1%, 1% additive. 其中,粗细银粉均为球形或类球形,振实密度>5. 5g/cm3 ;玻璃粉的软化点为380-480°C,玻璃粉的组成及其重量百分数为:氧化铅85%、氧化招O. 5%、氧化娃6%、氧化锌7. 5%、氧化镁1% ;玻璃粉具有双峰态粒径分布,平均粒径小于O. 5Mm的细玻璃粉重量上占25%,平均粒径为O. 5-5Mm的粗玻璃粉占75% ;添加剂为铜、锌单质按重量比1:1的混合物,具有双峰态粒径分布,平均粒径小于O. 5Mm的添加剂重量上占24%,平均粒径为O. 5_5Mm的添加剂占76%。 Among them, the thickness of the silver powder are spherical or spherical, a tap density> 5 5g / cm3; the softening point of the glass frit is 380-480 ° C, the glass frit composition and the weight percentages of: 85% lead oxide, oxide trick O. 5% 6% baby oxide, zinc oxide, 7.5%, 1% magnesium oxide; glass frit having a bimodal particle size distribution, the average particle size of less than 25% by weight of the glass frit O. fine 5Mm average O. 5-5Mm a particle size of 75% of coarse glass frit; additive is copper, zinc, elemental weight ratio of 1: 1 mixture, having a bimodal particle size distribution, the average particle diameter is less than the weight of the additive O. 5Mm 24%, an average particle diameter of the additive O. 5_5Mm 76%. [0018] 上述各实施方案是对本发明的上述内容作出的进一步说明,但不应理解为本发明上述主题的范围仅限于上述实施例。 [0018] each of the above embodiments are made to further illustrate the present invention described above, but the scope of the present invention should not be limited to the above subject to the above embodiment. 应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 It should be noted, for the ordinary person skilled in the art, without departing from the technical principles of the invention premise, can make various improvements and modifications, and these improvements and modifications should be the scope of the invention.

Claims (7)

  1. 1. 一种适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:该粉体料的组成及其重量百分数为:平均粒径为2-5Mffl的粗银粉50-75%、平均粒径为O. 5-2Mm的细银粉20-45%、玻璃粉1-9%、添加剂O. 1-3% ;其中,各组分的重量百分数之和为100%。 A high square resistance adaptation shallow junction solar cell with a silver paste positive material powder, wherein: the powder material composition and weight percentage: average particle diameter of the coarse silver 2-5Mffl 50 75%, an average particle diameter of the fine silver O. 5-2Mm 20-45%, 1-9% glass powder, additives O. 1-3%; wherein the weight percentages of the components is 100%.
  2. 2.根据权利要求1所述的适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:所述粗细银粉均为球形或类球形,振实密度>5. 5g/cm3。 The solar cell positive silver paste accommodate the high sheet resistance of the shallow junction with the powder material of claim 1, wherein: said thickness are spherical or spherical silver powder, tap density> 5 5g /. cm3.
  3. 3.根据权利要求1所述的适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:所述玻璃粉的软化点为380-480°C。 The adaptation of the high side of claim 1 shallow junction barrier solar cell with a positive silver paste material powder, wherein: a softening point of the glass frit is 380-480 ° C.
  4. 4.根据权利要求3所述的适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:所述玻璃粉的组成及其重量百分数为:氧化铅65-85%、氧化铝O. 5-5%、氧化硅1-10%、氧化锌1-10%、氧化镁1-10% ;其中,玻璃粉各组分重量百分数之和为100%。 The adaptation of the 3 high square resistance of the solar batteries are shallow junctions with the silver paste powder material, characterized in that the claims: the glass frit composition and a percent by weight: 65-85% lead oxide, alumina O. 5-5%, 1-10% silica, 1-10% zinc oxide, 1-10% magnesium oxide; wherein the weight percentages of each component of the glass frit is 100%.
  5. 5.根据权利要求3或4所述的适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:所述玻璃粉具有双峰态粒径分布,平均粒径小于O. 5Mm的细玻璃粉重量上占10-35%,余量为平均粒径为O. 5-5Mm的粗玻璃粉,粗玻璃粉和细玻璃粉的重量百分数之和为100%ο The adaptation of the 3 or 4 high square resistance of the solar batteries are shallow junctions with the silver paste powder material, characterized in that, wherein: said glass frit having a bimodal particle size distribution, the average particle size of less than O accounting for 10-35% by weight on a fine glass frit 5Mm balance being O. 5-5Mm average particle size of coarse glass frit, the glass frit and the percentages by weight of the coarse and fine glass frit is 100% ο
  6. 6.根据权利要求1所述的适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:所述添加剂为铜、锡、锌、镍金属单质中的一种或几种。 The adaptation of the high side to claim 1 shallow junction barrier solar cell with a silver paste positive material powder, wherein: the additive is a copper, tin, zinc, nickel metal simple substance of one or several species.
  7. 7.根据权利要求6所述的适应高方阻浅结的太阳能电池正银浆料用粉体料,其特征在于:所述添加剂具有双峰态粒径分布,平均粒径小于O. 5Mm的添加剂重量上占10-35%,余量为平均粒径为O. 5-5Mm的添加剂,两种不同粒径的添加剂的重量百分数之和为100%。 According to claim accommodate high square resistance of the solar batteries are shallow junctions with the silver paste powder material of claim 6, wherein: the additive having a bimodal particle size distribution, the average particle size of less than O. 5Mm accounted for 10-35% by weight of the additive, the balance being an average particle size of the additive O. 5-5Mm, percentages by weight of the two additives of different particle sizes up to 100%.
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