CN102637467A - Conductive paste for front electrode of silicon crystal solar battery - Google Patents

Conductive paste for front electrode of silicon crystal solar battery Download PDF

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CN102637467A
CN102637467A CN 201210127611 CN201210127611A CN102637467A CN 102637467 A CN102637467 A CN 102637467A CN 201210127611 CN201210127611 CN 201210127611 CN 201210127611 A CN201210127611 A CN 201210127611A CN 102637467 A CN102637467 A CN 102637467A
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conductive paste
conductive
agent
phase
oxide
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CN 201210127611
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张甦
杨兆国
汪山
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苏州晶讯科技股份有限公司
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Abstract

The invention discloses a conductive paste for a front electrode of a silicon crystal solar battery. The conductive paste is composed of the following materials in percentage by weight: 70%-92% of conductive phase, 1%-10% of glass phase and 5%-25% of organic phase; the conductive phase is composed of 80-99% of silver powder and 1-20% of titanium powder; the organic carrier is composed of the following constituents in parts by weight: 0.2-1 part of thickening agent, 6-9.2 parts of solvent, 0.1-1 part of thixotropic agent, 0.05-0.5 part of surface active agent, 0.3-2 parts of plasticizing agent and 0.05-0.2 parts of coupling agent; the thickening agent is at least one of ethyl cellulose, hydroxyethylcellulose, rosin, acrylic ester and phenolic resin; the thixotropic agent comprises at least one of acrylic resin, hydrogenated castor oil and polyethylene wax; and the surface active agent generally is at least one of lecithin, sorbitan tristearate, zinc stearate, sodium stearate and dodecanol ester. The conductive paste disclosed by the invention can be used for not only maintaining the existing technical performance, but also greatly reducing the cost of the conductive paste, thereby improving the competitive power of the silicon crystal solar battery.

Description

用于硅晶太阳能电池正面电极的导电浆料 The conductive paste for silicon solar cell of the front electrode

技术领域 FIELD

[0001] 本发明涉及一种半导体用导电浆料,特别涉及用于硅晶太阳能电池正面电极的导电浆料。 [0001] The present invention relates to a semiconductor with a conductive paste, in particular, it relates to a conductive paste for silicon solar cell of the front electrode.

背景技术 Background technique

[0002] 太阳能电池的主要原理是通过使用半导体材料,将较薄的N型半导体置于较厚的P型半导体上,当光子撞击该装置的表面时,P型和N型半导体的接合面有电子扩散产生电流,可利用上下两端的金属导体将电流引出利用。 The main principle of [0002] a solar cell by using a semiconductor material, the thin N-type semiconductor disposed on a thicker P-type semiconductor, when a photon strikes the surface of the device, P-type and N-type semiconductor bonded surface electron diffusion current is generated, the upper and lower ends by metal conductors use current lead. 其中与N型半导体相连接的电极称为正面电极。 Wherein the N-type semiconductor electrode is connected to is referred to as the front electrode.

[0003] 目前制备正面电极的主要方法为丝网印刷工艺。 [0003] The main method of preparing the front electrode is screen printing process. 晶体硅太阳能电池正电极用银电子浆料属于可烧结的厚膜导体浆料,它通过丝网印刷工艺印刷到硅片上,再经过热处理形成太阳能电池的正面电极。 Crystalline silicon solar cells belong to a positive electrode with a silver paste may be sintered electronic thick film conductor paste, it is printed on the wafer by a screen printing process, and then subjected to heat treatment forming the front electrode of a solar cell.

[0004] 太阳能正面电极用浆料包括导电相银粉末,玻璃相和有机载体,还含有其它的添加剂组成。 [0004] Solar positive electrode comprises a conductive paste with silver powder, a glass phase and an organic vehicle, also contain other additives. 导电相主要由银粉构成,作为电极的导电物质并提供焊接的平台。 Conductive phase mainly composed of silver powder as a conductive material of the electrode and welded to provide internet. 玻璃相为低熔点玻璃,在电极的烧结过程中,玻璃相会产生液化现象,液化的玻璃相会腐蚀晶体硅表面的减反射层,从而形成银与硅良好的欧姆接触。 Low melting point glass is a glass phase during sintering the electrodes, the glass produced meet liquefaction, the liquefied glass etching the antireflection layer meet crystal silicon surface to form a good ohmic contact with the silicon and silver. 有机载体的作用主要是提供银粉和玻璃粉分散的作用,并使浆料能够具备印刷性能。 The main role of the carrier is to provide an organic silver powder and glass frit dispersed in effect, and the slurry can be provided with printing performance.

[0005] CN1012057394公开了一种太阳能正面电极用导电浆料,该浆料包括导电金属粉、粘合剂、有机载体、溶剂和助剂,还包括添加剂,添加剂选自五氧化二磷和VIII族金属卤化物。 [0005] CN1012057394 discloses a solar positive electrode conductive paste, the conductive paste comprising a metal powder, binder, organic vehicle, solvent and additives, further comprising an additive selected from phosphorus pentoxide and VIII metal halides. 根据权利要求可知VIII族金属卤化物特别指金属铱的卤化物。 It refers particularly apparent claim Group VIII metal iridium halide, a metal halide.

[0006] CN101483207A公开了一种环保型硅太阳能正面栅线电极银导体浆料。 [0006] CN101483207A discloses a silicon solar environmental front gate line electrode silver conductor paste. 该浆料包含金属银粉60-80%,无铅玻璃粘结剂1_10%,欧姆接触添加剂0. 5-10%,有机树脂2-15%,溶剂10-25%,浆料改性剂1-8%。 The slurry contained 60-80% metallic silver, lead-free glass binder 1_10%, ohmic contact with the additive 0.5 to 10%, the organic resin is 2-15%, 10-25%, solvent, slurry modifier 1- 8%. 欧姆接触添加剂为Ba、Sr、Y,稀土金属(Pr、Er)和镧系元素的一种或几种,添加形式为氧化物或金属。 Ohmic contacts additive is Ba, one or more of Sr, Y, rare earth metals (Pr, Er) and the lanthanides, is added in the form of an oxide or a metal.

[0007] CN102324264A公开了一种硅基太阳能用银浆的制备方法,先制备无铅玻璃粉和有机粘合剂,然后将银粉、玻璃粉、有机粘合剂、溶剂混合,用三辊机辊碾。 [0007] CN102324264A discloses a method for preparing silicon solar silver paste, lead-free glass frit is first prepared, and an organic binder, glass frit and silver powder, an organic binder, a solvent mixture, with a three-roll mill roll grind.

[0008] 上述发明中CN1012057394导体金属为银,并使用金属铱的卤化物作为添加剂,该卤化物的价格不低于银粉的价格。 [0008] The invention CN1012057394 conductive metal is silver, and iridium used as an additive metal halide, the halide is not lower than the price of silver price. CN101483207A导体金属为银,使用欧姆接触添加剂,为Ba、Sr、Y,稀土金属(Pr、Er)和镧系元素的一种或几种,添加形式为氧化物或金属。 CN101483207A conductive metal is silver, the ohmic contact using the additive, one or more of Ba, Sr, Y, rare earth metals (Pr, Er) and the lanthanides, is added in the form of an oxide or a metal. 但在实施例中未公开所使用的究竟是何种添加剂。 However, in embodiments not disclosed what exactly is used additives. 且从名称看所使用的添加剂作用为提高欧姆接触性能,可推测添加的动机与成本无关。 And the additive effect from the name used to improve the ohmic contact performance to see, presumably independent of motivation and added cost. CN102324264A中使用的导体金属为银。 CN102324264A conductive metal used is silver.

[0009]目前主流的硅基太阳能正面电极用导电银浆所使用的导体金属都是银粉,不同之处在于银粉的规格,例如片状的、球形,粒径大小不同等。 [0009] The current mainstream silicon-based solar conductive metal conductive front electrode silver paste silver are used, except that the silver powder size, for example, different sheet-like, spherical, particle size.

[0010]目前的导电相主要由银粉构成,银粉具备较多优点例如电阻率低、不易氧化、可焊性好等,但银的价格高昂使其成本较高。 [0010] Current conducting phase mainly composed of silver powder, silver powder comprising a low number of advantages such as resistors, easily oxidized, and good weldability, but the high cost thereof expensive silver. 银浆制备主要的成本就是银粉,从2001年起银的价格不断上涨,但太阳能电池片成品、组件价格不断下降,由于其他成本的降低使浆料成本占电池生产总成本的比例不断上升。 Silver is the major cost of preparing silver, from 2001 onwards rising price of silver, but the finished solar cells, component prices continue to decline, due to the reduction of other costs that the ratio of the total battery production costs account for slurry rising cost. 因而降低浆料的制备成本对于整个太阳能电池制造行业都有意义。 Thus reducing the production cost of pulp for the entire solar cell manufacturing industry has meaning.

发明内容 SUMMARY

[0011] 本发明目的是提供一种用于硅晶太阳能电池正面电极的导电浆料,此导电浆料保持了现有技术性能同时,大大降低了导电浆料成本,从而提升了硅晶太阳能电池竞争力。 [0011] The object of the present invention is to provide a conductive slurry comprised silicon solar cell for the front electrode, the conductive paste while maintaining the performance of the prior art, greatly reducing the cost of the conductive paste, so as to enhance the crystalline silicon solar cell Competitiveness.

[0012] 为达到上述目的,本发明采用的技术方案是: [0012] To achieve the above object, the technical solution adopted by the invention are:

一种用于硅晶太阳能电池正面电极的导电浆料, A conductive paste of the positive electrode for crystalline silicon solar cell,

所述导电浆料的原料配方由下列质量百分含量的材料组成: The conductive paste material formulation by the mass percentage of the following materials:

导电相 70%〜92%, 70% ~92% conductive phase,

玻璃相 1%〜10%, 1% ~ 10% glass phase,

有机载体 5%〜25% ; The organic carrier 5% ~ 25%;

所述导电相由以下质量百分含量的材料组成: The conductive phase material mass percentage of the following composition:

银粉 80〜99%, Silver 80~99%

钛粉 I〜20% ; Titanium powder I~20%;

所述玻璃相为市售玻璃粉; The commercially available glass frit glass phase;

所述有机载体由以下重量份的各组分组成: The organic vehicle of each of the following components in parts by weight of the composition:

增稠剂 0. 2〜1, Thickeners 0. 2~1,

溶剂 6〜9. 2, The solvent 6~9. 2,

触变剂 0. I〜1, Thixotropic agents 0. I~1,

表面活性剂 0. 05〜0. 5, Surfactant 0.5 05~0. 5,

塑化剂 0. 03〜2, 0. 03~2 plasticizer,

偶联剂 0. 05〜0. 2 ; . 0. 05~0 coupling agent 2;

所述增稠剂为乙基纤维素、羟甲基纤维素、羟乙基纤维素、松香、丙烯酸酯和酚醛树脂中的至少一种; The thickening agent is ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, rosin, acrylate and at least one phenolic resin;

所述溶剂为松油醇、松节油、松节油透醇、丁基卡宓醇、丁基卡宓醇醋酸酯和蓖麻醇中的至少一种; The solvent is terpineol, turpentine oil, turpentine through alcohol, butyl alcohol Mi, Mi butyl acetate, and alcohols ricinoleate least one;

所述触变剂包括丙烯酸树脂、氢化蓖麻油、聚乙烯蜡中的至少一种; The thixotropic agents include acrylic resins, hydrogenated castor oil, at least one polyethylene wax;

所述表面活性剂,通常为卵磷脂、司班、硬脂酸锌、硬质酸钠、十二醇酯重的至少一种;所述塑化剂为邻苯二甲酸二丁酯、邻苯二甲酸二辛酯、柠檬酸三丁酯、乙酰柠檬酸三丁酯中的至少一种。 The surfactant is typically lecithin, Span, zinc stearate, sodium rigid, dodecyl ester by weight of at least one; phthalic the plasticizer is dibutyl phthalate, dimethyl dioctyl, tributyl citrate, acetyl tributyl citrate at least one of.

[0013] 上述技术方案中进一步改进技术方案如下: [0013] The foregoing technical solution further improve the technology scheme is as follows:

I、上述方案中,所述氧化铅、氧化硼、氧化铝、氧化钠、氧化硅、氧化钙按所述比例混合后在坩埚中,加热到1000〜1400度,保温10〜60分钟,水淬;然后破碎至10微米以下形成所述玻璃相。 I, the above-described embodiment, the lead oxide, boron oxide, aluminum oxide, sodium oxide, silicon oxide, calcium oxide after the mixed ratio in a crucible and heated to 1000~1400 °, incubated 10 to 60 minutes, water quenched ; said glass phase is then crushed to form a 10 microns or less.

[0014] 2、上述方案中,所述增稠剂、溶剂、塑化剂、表面活性剂、偶联剂和触变剂按所述比例混合后加热至60〜100度使其均匀混合、溶解形成所述有机载体。 [0014] 2, the above-described embodiment, the thickening agents, solvents, plasticizers, surfactants, thixotropic agent, coupling agent, and the press was heated to 60~100 ° proportions uniformly mixed and dissolved forming the organic vehicle.

[0015] 由于上述技术方案运用,本发明与现有技术相比具有下列优点和效果: [0015] Using the above technical solution, the present invention and the prior art has the following advantages and effects compared:

本发明导电浆料保持了现有技术性能同时,大大降低了导电浆料成本,从而提升了硅晶太阳能电池竞争力,由于钛具有比银更好的接触性能,所制备的浆料能够提供更好的欧姆接触性能,从而降低接触电阻,提高电池性能。 The conductive paste of the present invention while maintaining the performance of the prior art, greatly reducing the cost of the conductive paste, so as to enhance the competitiveness of the silicon solar cell, since the titanium has a better performance than silver contact, the prepared slurry can provide a more good ohmic contact performance, thereby reducing the contact resistance, improve battery performance.

具体实施方式[0016] 下面结合实施例对本发明作进一步描述: DETAILED DESCRIPTION [0016] The following embodiments in conjunction with embodiments of the present invention is further described:

实施例1-5 :—种用于硅晶太阳能电池正面电极的导电浆料,所述导电浆料的原料配方由有下列质量百分含量的材料组成,见表I : 所述有机载体由以下重量份的各组分组成,见表2 : Example 1-5: - kind of the conductive paste for a front electrode of the silicon solar cell, the conductive paste of the raw material formulation of the following composition in mass percentage, shown in Table I: said organic vehicle by the parts by weight of the respective components, see Table 2:

表2 Table 2

I增稠剂I溶剂j触变剂I表面活性剂I塑化剂I偶联剂实施例I的增稠剂为乙基纤维素;实施例2的增稠剂为乙基纤维素羟甲基纤维素;实 I thickeners thixotropic agents I I j solvent surfactants plasticizers I I coupling agent of Example I is ethyl cellulose thickener; Thickener Example 2 is hydroxymethyl ethyl cellulose cellulose; solid

施例3的增稠剂为乙基纤维素羟乙基纤维素;实施例4的增稠剂为乙基纤维素松香;实施 Example 3 is ethyl cellulose thickener hydroxyethyl cellulose; Thickener Example 4 for ethyl cellulose rosin; Embodiment

例5的增稠剂为乙基纤维素丙烯酸酯或者酚醛树脂; Thickener Example 5 are ethyl cellulose or acrylic resin, a phenol;

实施例I的溶剂为松油醇、实施例2的溶剂为松油醇松节油、实施例3的溶剂为松油醇 Example I The solvent is terpineol, and the solvent of Example 2 as terpineol turpentine, solvent Example 3 terpineol

松节油透醇、实施例4的溶剂为松油醇丁基卡宓醇、实施例5的溶剂为松油醇丁基卡宓醇醋 Turpentine through alcohol, the solvent of Example 4 Mi butyl alcohol, terpineol, terpineol acetate butyl alcohol solvent Mi Example 5

酸酯或者蓖麻醇; Or ricinoleic acid esters;

实施例I的触变剂为丙烯酸树脂;实施例2的触变剂为氢化蓖麻油;实施例3的触变剂为聚乙烯蜡;实施例4的触变剂为丙烯酸树脂和氢化蓖麻油混合物,两者混合质量比例为I =I ;实施例5的触变剂为氢化蓖麻油和聚乙烯蜡混合物,两者混合质量比例为I :1 ; Example I thixotropic agent is an acrylic resin; Embodiment Example 2 thixotropic agent is hydrogenated castor oil; Example 3 thixotropic agent is polyethylene wax; Example 4 thixotropic agent is a mixture of acrylic resins and hydrogenated castor oil both the mixing mass ratio of I = I; thixotropic agent of Example 5 was a mixture of polyethylene wax and hydrogenated castor oil, a mixture of both as a mass ratio of I: 1;

实施例I的表面活性剂为卵磷脂;实施例2的表面活性剂司班;实施例3的表面活性剂硬脂酸锌;实施例4的表面活性剂硬质酸钠;实施例5的表面活性剂十二醇酯; Surfactant Example I lecithin; Span surfactant of Example 2; zinc stearate surfactant of Example 3; Example Surfactant 4 Sodium rigid embodiment; surface Example 5 active agent dodecyl ester;

实施例I的塑化剂为邻苯二甲酸二丁酯;实施例2的塑化剂为邻苯二甲酸二辛酯;实施例3的塑化剂为柠檬酸三丁酯;实施例4的塑化剂为乙酰柠檬酸三丁酯;实施例5的塑化剂为柠檬酸三丁酯、邻苯二甲酸二丁酯和乙酰柠檬酸三丁酯的混合物,三者的混合质量比例为I :1 :1。 Example I plasticizer is dibutyl phthalate; Example 2 plasticizer is dioctyl phthalate; Example plasticizer is tributyl citrate 3; Example 4 plasticizer is acetyl tributyl citrate; Example 5 plasticizer is tributyl citrate, tributyl mixture of dibutyl phthalate and acetyl tributyl citrate, the mixing mass ratio of the three is I : 1: 1.

[0017] 上述氧化铅、氧化硼、氧化铝、氧化钠、氧化硅、氧化钙按所述比例混合后在坩埚中,加热到1000〜1400度,保温10〜60分钟,水淬;然后破碎至10微米以下形成所述玻璃相。 [0017] The lead oxide, boron oxide, aluminum oxide, sodium oxide, silicon oxide, calcium oxide after the mixed ratio in a crucible and heated to 1000~1400 °, incubated 10 to 60 minutes, water quenched; and then crushed to 10 micrometers or less of the glass phase.

[0018] 上述增稠剂、溶剂、塑化剂、表面活性剂、偶联剂和触变剂按所述比例混合后加热至60〜 100度使其均匀混合、溶解形成所述有机载体。 [0018] The thickening agents, solvents, plasticizers, surfactants, thixotropic agent, coupling agent, and the mixing ratio of the press was heated to 100 degrees 60~ uniformly mixed and dissolved to form the organic vehicle.

[0019] 上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。 [0019] Examples of the above-described embodiments illustrate the technical concept and features of the invention, its object is to only allow those skilled in the art to understand the present invention and according to embodiments, and not limit the scope of this invention. 凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。 Where an equivalent changes or modifications made from the spirit of the present invention, shall fall within the scope of the present invention.

Claims (3)

  1. 1. 一种用于硅晶太阳能电池正面电极的导电浆料,其特征在于: 所述导电浆料的原料配方由有下列质量百分含量的材料组成: 导电相 70%〜92%, 玻璃相 1%〜10%, 有机载体 5%〜25% ; 所述导电相由以下质量百分含量的材料组成: 银粉 80〜99%, 钛粉 I〜20% ; 所述玻璃相为市售玻璃粉; 所述有机载体由以下重量份的各组分组成: 增稠剂 O. 2〜1, 溶剂 6〜9. 2, 触变剂 O. I〜1, 表面活性剂 O. 05〜O. 5, 塑化剂 O. 3〜2, 偶联剂 O. 05〜O. 2 ; 所述增稠剂为乙基纤维素、羟甲基纤维素、羟乙基纤维素、松香、丙烯酸酯和酚醛树脂中的至少一种; 所述溶剂为松油醇、松节油、松节油透醇、丁基卡宓醇、丁基卡宓醇醋酸酯和蓖麻醇中的至少一种; 所述触变剂包括丙烯酸树脂、氢化蓖麻油、聚乙烯蜡中的至少一种; 所述表面活性剂,通常为卵磷脂、司班、硬脂酸锌 A silicon solar cell conductive paste for a front electrode, wherein: the conductive paste raw material formulation of the following composition in mass percentage: 70% ~92% conductive phase, glass phase 1% ~ 10%, ~ 25% organic carrier 5%; with a conductive material composed of the following mass percentage: 80~99% silver powder, titanium powder I~20%; glass phase of the glass frit is commercially available ; the organic vehicle in each of the following parts by weight of components: thickener O. 2~1, 6~9 2 solvents, thixotropic agents O. I~1, surfactants O. 05~O 5.. ., plasticizers O. 3~2, coupling O. 05~O 2; the thickener is ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, rosin, acrylate and phenol at least one resin; the solvent is terpineol, turpentine oil, turpentine through alcohol, at least one Mi butyl alcohol, butyl acetate, and alcohols Mi castor alcohol; the thixotropic agent comprises acrylic resins, hydrogenated castor oil, at least one of a polyethylene wax; and the surfactant, usually as lecithin, Span, zinc stearate 、硬质酸钠、十二醇酯中的至少一种;所述塑化剂为邻苯二甲酸二丁酯、邻苯二甲酸二辛酯、柠檬酸三丁酯、乙酰柠檬酸三丁酯中的至少一种。 , Sodium rigid, lauryl alcohol esters at least one of; the plasticizer is dibutyl phthalate, dioctyl phthalate, tributyl citrate, acetyl tributyl citrate at least one.
  2. 2.根据权利要求I所述的导电浆料,其特征在于:所述氧化铅、氧化硼、氧化铝、氧化钠、氧化硅、氧化钙按所述比例混合后在坩埚中,加热到1000〜1400度,保温10〜60分钟,水淬;然后破碎至10微米以下形成所述玻璃相。 The conductive paste according to claim I, wherein: said lead oxide, boron oxide, aluminum oxide, sodium oxide, silicon oxide, calcium oxide according to the mixing ratio in the crucible and heated to 1000~ 14000C, incubated 10 to 60 minutes, water quenched; 10 microns or less and then crushed to form the glass phase.
  3. 3.根据权利要求I所述的导电浆料,其特征在于:所述增稠剂、溶剂、塑化剂、表面活性剂、偶联剂和触变剂按所述比例混合后加热至60〜100度使其均匀混合、溶解形成所述有机载体。 The conductive paste according to claim I, wherein: said thickeners, solvents, plasticizers, surfactants, thixotropic agent, coupling agent, and heated to 60~ by the mixing ratio of the 100 degrees uniformly mixed and dissolved to form the organic vehicle.
CN 201210127611 2012-04-27 2012-04-27 Conductive paste for front electrode of silicon crystal solar battery CN102637467A (en)

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CN103559936A (en) * 2013-09-22 2014-02-05 江苏瑞德新能源科技有限公司 Solar cell front silver paste with easy screen printing
CN103680673A (en) * 2012-08-31 2014-03-26 上海比亚迪有限公司 Light-facing side seed layer paste for SE (Selective Emitter) crystalline silicon solar cell, preparation method for light-facing side seed layer paste, SE crystalline silicon solar cell, and preparation method for SE crystalline silicon solar cell
CN104112488A (en) * 2014-06-30 2014-10-22 合肥中南光电有限公司 Plant ash/silver powder compounded conductive silver paste and manufacturing method thereof
CN104167236A (en) * 2014-07-30 2014-11-26 安徽状元郎电子科技有限公司 Conductive silver paste compounded by bamboo charcoal powder and alum ore tailings and production method thereof
CN105924871A (en) * 2016-06-06 2016-09-07 怀远县金浩电子科技有限公司 Preparation method of gas-sensitive slurry for semiconductor gas-sensitive element
CN107068240A (en) * 2017-02-20 2017-08-18 江苏瑞德新能源科技有限公司 Back silver paste
CN107068241A (en) * 2017-02-20 2017-08-18 江苏瑞德新能源科技有限公司 Positive silver paste and preparation method thereof

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CN103680673A (en) * 2012-08-31 2014-03-26 上海比亚迪有限公司 Light-facing side seed layer paste for SE (Selective Emitter) crystalline silicon solar cell, preparation method for light-facing side seed layer paste, SE crystalline silicon solar cell, and preparation method for SE crystalline silicon solar cell
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CN103559936A (en) * 2013-09-22 2014-02-05 江苏瑞德新能源科技有限公司 Solar cell front silver paste with easy screen printing
CN103559936B (en) * 2013-09-22 2016-05-18 江苏瑞德新能源科技有限公司 An easily screen-printed solar cell positive silver paste
CN104112488A (en) * 2014-06-30 2014-10-22 合肥中南光电有限公司 Plant ash/silver powder compounded conductive silver paste and manufacturing method thereof
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CN104167236A (en) * 2014-07-30 2014-11-26 安徽状元郎电子科技有限公司 Conductive silver paste compounded by bamboo charcoal powder and alum ore tailings and production method thereof
CN105924871A (en) * 2016-06-06 2016-09-07 怀远县金浩电子科技有限公司 Preparation method of gas-sensitive slurry for semiconductor gas-sensitive element
CN107068240A (en) * 2017-02-20 2017-08-18 江苏瑞德新能源科技有限公司 Back silver paste
CN107068241A (en) * 2017-02-20 2017-08-18 江苏瑞德新能源科技有限公司 Positive silver paste and preparation method thereof

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