CN106477897A - Glass dust and apply this glass dust be obtained anelectrode silver paste, solaode - Google Patents
Glass dust and apply this glass dust be obtained anelectrode silver paste, solaode Download PDFInfo
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Abstract
一种玻璃粉，其包括PbO、Bi2O3、TeO2、SiO2，在该玻璃粉中，PbO的质量百分含量为20％～60％，Bi2O3的质量百分含量为10％～50％，TeO2的质量百分含量为20％～60％，SiO2的质量百分含量为5～15％。所述玻璃粉通过调整优化化学组成，从而使得使用由该玻璃粉制得的正电极银浆制备的电极具备较高的光电转换效率及较优的拉力性能，保证了太阳能电池的使用寿命。另，本发明还提供一种应用所述玻璃粉制得的正电极银浆，应用该正电极银浆制得的太阳能电池。A glass powder comprising PbO, Bi 2 O 3 , TeO 2 and SiO 2 , in the glass powder, the mass percentage of PbO is 20% to 60%, and the mass percentage of Bi 2 O 3 is 10% % to 50%, the mass percentage of TeO 2 is 20% to 60%, and the mass percentage of SiO 2 is 5 to 15%. By adjusting and optimizing the chemical composition of the glass powder, the electrode prepared by using the positive electrode silver paste prepared from the glass powder has higher photoelectric conversion efficiency and better tensile performance, ensuring the service life of the solar cell. In addition, the present invention also provides a positive electrode silver paste prepared by using the glass powder, and a solar cell prepared by using the positive electrode silver paste.
Description
技术领域technical field
本发明涉及一种玻璃粉，应用该玻璃粉制得的正电极银浆,及应用该正电极银浆制得的太阳能电池。The invention relates to a glass powder, a positive electrode silver paste prepared by using the glass powder, and a solar cell prepared by using the positive electrode silver paste.
背景技术Background technique
随着人类与环境之间矛盾的不断凸显，以及传统能源的日益短缺，太阳能作为一种可持续的、无污染的绿色新能源受到了普遍的重视，可以预测的是，太阳能发电在未来人类能源结构中所占的比例将会越来越重。With the increasingly prominent contradiction between human beings and the environment, as well as the increasing shortage of traditional energy sources, solar energy, as a sustainable, non-polluting green new energy, has received widespread attention. The proportion of the structure will become heavier and heavier.
晶体硅太阳能电池是一种将光能转化为电能并加以存储利用的太阳能发电装置。常规P型基板太阳能电池具有在正面(光照面)上的负极和背面(背光面)上的正极结构，太阳光照射到电池片正面从而形成电子-空穴对，载流子在PN结形成的内部电场的作用下发生定向迁移，并通过印刷烧结在电池片正面电极和背面电极传导至外部电路。A crystalline silicon solar cell is a solar power generation device that converts light energy into electrical energy and stores it. Conventional P-type substrate solar cells have a negative electrode on the front (illuminated surface) and a positive electrode structure on the back (backlit surface). Sunlight shines on the front of the cell to form electron-hole pairs, and the carriers are formed in the PN junction. Directional migration occurs under the action of the internal electric field, and is conducted to the external circuit through printing and sintering on the front and back electrodes of the battery sheet.
太阳能电池正电极银浆用于在太阳能电池片光照面形成电极，其主要由玻璃料、导电功能粉体、有机介质以及添加剂辊压而成，再经由丝网印刷和高温快速烧结后形成。其中，玻璃料在电池片正面形成良好的欧姆接触，对电流的传导发挥着关键的作用，是电池片优良光电转换效率的前提和保障。The positive electrode silver paste of solar cells is used to form electrodes on the illuminated surface of solar cells. It is mainly formed by rolling glass frit, conductive functional powder, organic medium and additives, and then formed by screen printing and high-temperature rapid sintering. Among them, the glass frit forms a good ohmic contact on the front of the cell, which plays a key role in the conduction of current, and is the premise and guarantee for the excellent photoelectric conversion efficiency of the cell.
为了增加对太阳光的吸收，提高电池的转换效率，通常在电池片光照面涂覆一层80～100nm左右的减反射涂层(如氮化硅、氧化硅、氧化钛等)，该涂层还可以起到钝化层的效果，增加载流子的寿命，提高开路电压和电流。因此，要求正电极银浆料在烧结过程中不仅要能充分刻蚀减反射层，对硅片的腐蚀作用弱，还要与硅片形成较强的粘结强度和良好的欧姆接触。In order to increase the absorption of sunlight and improve the conversion efficiency of the battery, a layer of anti-reflection coating (such as silicon nitride, silicon oxide, titanium oxide, etc.) of about 80-100 nm is usually coated on the illuminated surface of the battery sheet. It can also act as a passivation layer, increase the life of carriers, and increase the open circuit voltage and current. Therefore, it is required that the positive electrode silver paste should not only fully etch the anti-reflection layer and have a weak corrosion effect on the silicon wafer during the sintering process, but also form a strong bond strength and good ohmic contact with the silicon wafer.
然而，现有正电极银浆料面临的主要问题之一是光电转换效率与拉力之间的矛盾，如何开发出一款性能优异，兼顾高光电转换效率和高拉力的太阳能正电极银浆料，是目前业界关注的重点。However, one of the main problems faced by the existing positive electrode silver paste is the contradiction between photoelectric conversion efficiency and tensile force. How to develop a solar positive electrode silver paste with excellent performance, high photoelectric conversion efficiency and high tensile force, It is the focus of the current industry.
发明内容Contents of the invention
有鉴于此，有必要提供一种新的玻璃粉，以解决上述问题。In view of this, it is necessary to provide a new glass powder to solve the above problems.
一种玻璃粉，其主要包括PbO、Bi2O3、TeO2、SiO2，在该玻璃粉中，PbO的质量百分含量为20％～60％，Bi2O3的质量百分含量为10％～50％，TeO2的质量百分含量为20％～60％，SiO2的质量百分含量为5～15％。A glass powder, which mainly includes PbO, Bi 2 O 3 , TeO 2 , SiO 2 , in the glass powder, the mass percentage of PbO is 20% to 60%, and the mass percentage of Bi 2 O 3 is 10%-50%, the mass percentage of TeO 2 is 20%-60%, and the mass percentage of SiO 2 is 5-15%.
一种应用上述玻璃粉的正电极银浆，其包括有机载体、及分散于自有机载体内的银粉和所述玻璃粉。A positive electrode silver paste using the above-mentioned glass powder, which includes an organic vehicle, silver powder and the glass powder dispersed in the organic vehicle.
一种应用上述正电极银浆的太阳能电池，其包括多晶硅电池片及结合在该多晶硅电池片表面的正电极，该正电极通过将所述正电极银浆印刷在多晶硅电池片上并烧结后形成。A solar cell using the positive electrode silver paste, which includes a polycrystalline silicon cell and a positive electrode bonded to the surface of the polycrystalline silicon cell, the positive electrode is formed by printing the positive electrode silver paste on the polycrystalline silicon cell and sintering.
所述玻璃粉通过调整优化化学组成，一方面，降低了熔融玻璃液的表面张力，改善玻璃液的润湿性能，从而提高了玻璃料的熔银析银能力，而纳米银的析出有助于玻璃层的多层隧道导电，可以保证正电极与多晶硅电池片之间形成良好的欧姆接触，从而使得制备的正电极银浆具备较高的光电转换效率；另一方面，还可以提高玻璃本身的结构强度，同时由于润湿性能的改善，玻璃过渡层厚度均匀，浆料在烧结后具备更高的拉力，从而使得制备的正电极银浆具备更优的拉力性能，保证了太阳能电池的使用寿命。By adjusting and optimizing the chemical composition of the glass frit, on the one hand, it reduces the surface tension of the molten glass, improves the wettability of the glass, thereby improving the silver melting ability of the glass frit, and the precipitation of nano-silver contributes to The multi-layer tunnel of the glass layer conducts electricity, which can ensure a good ohmic contact between the positive electrode and the polysilicon cell, so that the prepared positive electrode silver paste has a high photoelectric conversion efficiency; on the other hand, it can also improve the glass itself. At the same time, due to the improvement of wetting performance, the thickness of the glass transition layer is uniform, and the paste has higher tensile force after sintering, so that the prepared positive electrode silver paste has better tensile performance and ensures the service life of the solar cell .
具体实施方式detailed description
本发明较佳实施方式提供一种玻璃粉，其主要用于晶体硅太阳能电池正电极银浆的制备。该玻璃粉为PbO-Bi2O3-TeO2体系的玻璃粉。该玻璃粉主要包括PbO(氧化铅)、Bi2O3(三氧化二铋)、TeO2(二氧化碲)、SiO2(二氧化硅)。其中，在该玻璃粉中，PbO的质量百分含量为20％～60％，Bi2O3的质量百分含量为10％～50％，TeO2的质量百分含量为20％～60％，SiO2的质量百分含量为5～15％。A preferred embodiment of the present invention provides a glass frit, which is mainly used in the preparation of silver paste for positive electrodes of crystalline silicon solar cells. The glass powder is a glass powder of PbO-Bi 2 O 3 -TeO 2 system. The glass powder mainly includes PbO (lead oxide), Bi 2 O 3 (bismuth trioxide), TeO 2 (tellurium dioxide), SiO 2 (silicon dioxide). Wherein, in the glass powder, the mass percentage of PbO is 20%-60%, the mass percentage of Bi2O3 is 10 %-50%, and the mass percentage of TeO2 is 20 %-60%. , the mass percentage of SiO 2 is 5-15%.
所述玻璃粉的中位粒径的范围为0.5μm～3μm。The median particle diameter of the glass powder is in the range of 0.5 μm to 3 μm.
所述PbO可以降低玻璃熔点，提高玻璃的成玻范围、拓宽工艺窗口。同时，PbO具有良好的熔银能力，以及对多晶硅电池片表面的钝化层的刻蚀能力。The PbO can lower the melting point of the glass, increase the glass-forming range of the glass, and widen the process window. At the same time, PbO has good ability to melt silver and etch the passivation layer on the surface of polysilicon cells.
所述Bi2O3有助于降低玻璃熔点，并对多晶硅电池片表面的钝化层有较好的刻蚀效果。Bi2O3的添加可以相对减少PbO的用量，能够改善玻璃料对多晶硅电池片的过度腐蚀。The Bi 2 O 3 helps to lower the melting point of the glass, and has a better etching effect on the passivation layer on the surface of the polycrystalline silicon cell. The addition of Bi 2 O 3 can relatively reduce the amount of PbO, and can improve the excessive corrosion of glass frit on polycrystalline silicon cells.
所述TeO2有助于形成玻璃网络结构，提高玻璃粉的熔银析银能力，并一定程度降低玻璃组分对多晶硅电池片表面的腐蚀。The TeO 2 helps to form a glass network structure, improves the ability of the glass powder to melt silver and precipitate silver, and to a certain extent reduce the corrosion of the glass component on the surface of the polycrystalline silicon cell.
所述SiO2可以增强玻璃粉的网络结构，提高稳定性。The SiO 2 can strengthen the network structure of the glass frit and improve the stability.
所述玻璃粉还包括但不限于WO3(氧化钨)、ZnO(氧化锌)、CaO(氧化钙)、MgO(氧化镁)、Al2O3(三氧化二铝)、Li2O(氧化锂)、Na2O(氧化钠)、Fe2O3(三氧化二铁)、B2O3(氧化硼)及BaO(氧化钡)等氧化物中的一种或多种，以进一步优化玻璃粉的性能。The glass powder also includes but not limited to WO 3 (tungsten oxide), ZnO (zinc oxide), CaO (calcium oxide), MgO (magnesium oxide), Al 2 O 3 (aluminum oxide), Li 2 O (oxide Lithium), Na 2 O (sodium oxide), Fe 2 O 3 (ferric oxide), B 2 O 3 (boron oxide) and BaO (barium oxide) and other oxides to further optimize Properties of glass powder.
其中，在玻璃粉中，WO3的质量百分含量为0.5％～10％，ZnO的质量百分含量为0.5％～5％，CaO的质量百分含量为0～2％，MgO的质量百分含量为0～2％，Al2O3的质量百分含量为0～2％，Li2O的质量百分含量为0.5％～3％，Na2O的质量百分含量为0～2％，Fe2O3的质量百分含量为0.5％～2％，B2O3的质量百分含量为0.5％～2％，BaO的质量百分含量为0～2％。Wherein, in the glass powder, the mass percentage of WO 3 is 0.5% to 10%, the mass percentage of ZnO is 0.5% to 5%, the mass percentage of CaO is 0 to 2%, and the mass percentage of MgO is The mass percentage of Al 2 O 3 is 0-2%, the mass percentage of Li 2 O is 0.5%-3%, and the mass percentage of Na 2 O is 0-2% %, the mass percentage of Fe 2 O 3 is 0.5% to 2%, the mass percentage of B 2 O 3 is 0.5% to 2%, and the mass percentage of BaO is 0 to 2%.
所述WO3可以降低玻璃液的表面张力，提高润湿能力，有助于提高使用由该玻璃粉制得的正电极银浆所制备的正电极的拉力性能。The WO 3 can reduce the surface tension of the glass liquid, improve the wettability, and help to improve the tensile performance of the positive electrode prepared by using the positive electrode silver paste prepared from the glass frit.
所述ZnO、CaO、MgO、BaO有助于调节玻璃粉的高温粘度。The ZnO, CaO, MgO and BaO help to adjust the high-temperature viscosity of the glass frit.
所述Al2O3可以增强玻璃粉的网络结构，提高稳定性。The Al 2 O 3 can strengthen the network structure of the glass powder and improve the stability.
所述Li2O、Na2O、B2O3可以帮助降低玻璃熔点，同时，Li还可以调节玻璃层的膨胀系数，提高玻璃粉的强度，对玻璃粉的拉力性能有帮助。The Li 2 O, Na 2 O, and B 2 O 3 can help reduce the melting point of the glass. At the same time, Li can also adjust the expansion coefficient of the glass layer, improve the strength of the glass powder, and help the tensile performance of the glass powder.
所述Fe2O3可以降低玻璃膨胀系数，提高玻璃粉的强度。The Fe 2 O 3 can reduce the glass expansion coefficient and improve the strength of the glass powder.
一种上述玻璃粉的制备方法，其包括如下步骤：A kind of preparation method of above-mentioned glass powder, it comprises the steps:
步骤S1：将PbO、Bi2O3、TeO2、SiO2、WO3、ZnO、CaO、MgO、Al2O3、Li2O、Na2O、Fe2O3、B2O3及BaO等氧化物按照预定比例混合均匀并加入铂金坩埚中。Step S1: PbO, Bi 2 O 3 , TeO 2 , SiO 2 , WO 3 , ZnO, CaO, MgO, Al 2 O 3 , Li 2 O, Na 2 O, Fe 2 O 3 , B 2 O 3 and BaO The oxides are mixed evenly according to the predetermined ratio and added to the platinum crucible.
步骤S2：将上述装有氧化物的铂金坩埚放入高温烧结炉中，在800～1200℃的温度下高温烧制，保温0.5h～2h，得到熔融玻璃液。Step S2: Put the above-mentioned platinum crucible filled with oxides into a high-temperature sintering furnace, sinter at a temperature of 800-1200° C., and keep it warm for 0.5-2 hours to obtain molten glass.
步骤S3：对上述熔融玻璃液进行淬冷，形成非晶态的玻璃颗粒。Step S3: Quenching the molten glass to form amorphous glass particles.
步骤S4：将上述玻璃颗粒置于球磨机中进行球磨，得到中位粒径范围为0.5μm～3μm的玻璃粉。Step S4: Put the above glass particles in a ball mill for ball milling to obtain glass powder with a median particle size ranging from 0.5 μm to 3 μm.
可以理解的，在所述步骤S1中，还可以使用可以分解成相应氧化物的各种盐或氟化物等取代所述氧化物。It can be understood that in the step S1, various salts or fluorides that can be decomposed into corresponding oxides can also be used instead of the oxides.
一种正电极银浆，其主要用于制作太阳能电池的正电极。该正电极银浆包括有机载体、及分散于自有机载体内的玻璃粉和银粉。该正电极银浆中，有机载体的质量百分含量为3％～15％，玻璃粉的质量百分含量为0.5％～5％，银粉的质量百分含量为80％～95％。A positive electrode silver paste is mainly used for making positive electrodes of solar cells. The positive electrode silver paste includes an organic carrier, and glass powder and silver powder dispersed in the organic carrier. In the positive electrode silver paste, the mass percentage of the organic carrier is 3%-15%, the mass percentage of the glass powder is 0.5%-5%, and the mass percentage of the silver powder is 80%-95%.
所述有机载体包括有机树脂、溶剂、分散剂、增塑剂、表面活性剂及触变剂。其中，所述有机载体中，有机树脂的质量百分含量为2％～10％，溶剂的质量百分含量为70％～80％，分散剂的质量百分含量为1％～10％，增塑剂的质量百分含量为1％～8％，表面活性剂的质量百分含量为0.5％～2％，触变剂的质量百分含量为0.5％～6％。The organic vehicle includes organic resin, solvent, dispersant, plasticizer, surfactant and thixotropic agent. Wherein, in the organic vehicle, the mass percentage of the organic resin is 2% to 10%, the mass percentage of the solvent is 70% to 80%, and the mass percentage of the dispersant is 1% to 10%. The mass percentage content of the plasticizer is 1%-8%, the mass percentage content of the surfactant is 0.5%-2%, and the mass percentage content of the thixotropic agent is 0.5%-6%.
所述有机树脂为常规应用于正电极银浆的有机树脂。所述有机树脂包括但不限于乙基纤维素、醋丁纤维素、松香树脂、酚醛树脂及酚醛环氧树脂的一种或几种。The organic resin is an organic resin commonly used in positive electrode silver paste. The organic resins include, but are not limited to, one or more of ethyl cellulose, cellulose acetate, rosin resin, phenolic resin and novolac epoxy resin.
所述溶剂为常规应用于正电极银浆的溶剂。所述溶剂包括但不限于松油醇、二乙二醇单丁醚醋酸酯、十二醇酯、己二酸二甲酯、戊二酸二甲酯及二乙二醇二丁醚的一种或几种。The solvent is a solvent commonly used in positive electrode silver paste. Described solvent includes but not limited to a kind of of terpineol, diethylene glycol monobutyl ether acetate, lauryl alcohol ester, dimethyl adipate, dimethyl glutarate and diethylene glycol dibutyl ether or several.
所述分散剂为常规应用于正电极银浆的分散剂。所述分散剂包括但不限于二甲基环己胺、聚丙烯酰胺、脂肪酸聚乙二醇酯、三乙基己基磷酸、纤维素衍生物及改性松香树脂中的一种或几种。The dispersant is a dispersant commonly used in positive electrode silver paste. The dispersant includes but not limited to one or more of dimethylcyclohexylamine, polyacrylamide, polyethylene glycol fatty acid ester, triethylhexyl phosphoric acid, cellulose derivatives and modified rosin resin.
所述增塑剂为常规应用于正电极银浆的增塑剂。所述增塑剂包括但不限于柠檬酸三丁酯、邻苯二甲酸甲酯及邻苯二甲酸二辛脂的一种或几种。The plasticizer is a plasticizer commonly used in positive electrode silver paste. The plasticizer includes but not limited to one or more of tributyl citrate, methyl phthalate and dioctyl phthalate.
所述表面活性剂为常规应用于正电极银浆的表面活性剂。所述表面活性剂包括但不限于卵磷脂、失水山梨醇脂肪酸酯、聚醚类物质的一种或几种。The surfactant is a surfactant commonly used in positive electrode silver paste. The surfactant includes, but is not limited to, one or more of lecithin, sorbitan fatty acid ester, and polyether.
所述触变剂为常规应用于正电极银浆的触变剂。所述触变剂包括但不限于聚酰胺蜡及改性氢化蓖麻油的一种或两种。The thixotropic agent is a thixotropic agent commonly used in positive electrode silver paste. The thixotropic agent includes but not limited to one or both of polyamide wax and modified hydrogenated castor oil.
所述银粉主要由第一银粉和第二银粉组成。该第一银粉为粒径范围为1.6μm～1.8μm的球状银粉，该第二银粉为粒径范围为2.0μm～2.2μm的球状银粉。所述银粉中，第一银粉的质量百分含量为10％～90％，第二银粉的质量百分含量为10％～90％。The silver powder is mainly composed of the first silver powder and the second silver powder. The first silver powder is a spherical silver powder with a particle diameter ranging from 1.6 μm to 1.8 μm, and the second silver powder is a spherical silver powder with a particle diameter ranging from 2.0 μm to 2.2 μm. In the silver powder, the mass percentage of the first silver powder is 10%-90%, and the mass percentage of the second silver powder is 10%-90%.
一种正电极银浆的制备方法，其包括如下步骤：A kind of preparation method of positive electrode silver paste, it comprises the steps:
步骤S11：制备或提供所述玻璃粉。Step S11: preparing or providing the glass powder.
步骤S21：提供所述银粉，将银粉及玻璃粉按照预定的比例放入V型混料机中，混料5～10小时候取出，得到混合均匀的粉体。Step S21: Provide the silver powder, put the silver powder and glass powder into a V-shaped blender according to a predetermined ratio, and take it out after 5-10 hours of mixing to obtain a uniformly mixed powder.
步骤S31：将有机树脂、溶剂、分散剂、增塑剂、表面活性剂及触变剂按照预定比例混合后加热至80℃～120℃，混合搅拌至有机树脂溶解，得到有机载体。Step S31: Mix the organic resin, solvent, dispersant, plasticizer, surfactant and thixotropic agent according to a predetermined ratio, heat to 80° C. to 120° C., mix and stir until the organic resin dissolves, and obtain an organic vehicle.
步骤S41：将所述粉体及有机载体按照预定比例混合均匀，然后在三辊研磨机上进行研磨，三辊研磨机的辊距调整为40μm～100μm，研磨5～10次，即制得均匀分散的正电极银浆。其中，该正电极银浆的细度小于10μm，正电极银浆的粘度范围大致为200mpa·s～350mpa·s。Step S41: Mix the powder and organic carrier uniformly according to a predetermined ratio, and then grind on a three-roll mill with the roller distance adjusted to 40 μm to 100 μm, and grind for 5 to 10 times to obtain a uniformly dispersed positive electrode silver paste. Wherein, the fineness of the positive electrode silver paste is less than 10 μm, and the viscosity range of the positive electrode silver paste is approximately 200mpa·s˜350mpa·s.
一种太阳能电池，其包括多晶硅电池片及结合在该多晶硅电池片表面的正电极，该正电极通过将所述正电极银浆印刷在多晶硅电池片上并烘干烧结后形成。A solar cell, which includes a polycrystalline silicon solar cell and a positive electrode combined on the surface of the polycrystalline silicon solar cell, the positive electrode is formed by printing the positive electrode silver paste on the polycrystalline silicon solar cell, drying and sintering.
下面通过具体实施例来对本发明做进一步说明。The present invention will be further described below through specific examples.
实施例1Example 1
本实施例中，玻璃粉由PbO、Bi2O3、TeO2、SiO2、WO3、ZnO、CaO、MgO、Al2O3、Li2O、Na2O、Fe2O3、B2O3及BaO制备而成。In this example, the glass powder is made of PbO, Bi 2 O 3 , TeO 2 , SiO 2 , WO 3 , ZnO, CaO, MgO, Al 2 O 3 , Li 2 O, Na 2 O, Fe 2 O 3 , B 2 Prepared from O 3 and BaO.
其中，PbO的质量百分含量为30％，TeO2的质量百分含量为31％，Bi2O3的质量百分含量为22％，SiO2的质量百分含量为7％，ZnO的质量百分含量为2％，Na2O的质量百分含量为1％，Li2O的质量百分含量为1.5％，Al2O3的质量百分含量为1％，CaO的质量百分含量为0.5％，B2O3的质量百分含量为1％，Fe2O3的质量百分含量为0.5％，BaO的质量百分含量为0.5％，MgO的质量百分含量为0.5％，WO3的质量百分含量为1.5％。Wherein, the mass percentage of PbO is 30%, the mass percentage of TeO 2 is 31%, the mass percentage of Bi 2 O 3 is 22%, the mass percentage of SiO 2 is 7%, the mass percentage of ZnO The percentage content is 2 %, the mass percentage content of Na2O is 1%, the mass percentage content of Li2O is 1.5%, the mass percentage content of Al2O3 is 1 %, the mass percentage content of CaO 0.5%, the mass percentage of B2O3 is 1 %, the mass percentage of Fe2O3 is 0.5 %, the mass percentage of BaO is 0.5%, and the mass percentage of MgO is 0.5%, The mass percentage of WO 3 is 1.5%.
实施例2Example 2
本实施例中，玻璃粉由PbO、Bi2O3、TeO2、SiO2、WO3、ZnO、CaO、MgO、Al2O3、Li2O、Na2O、Fe2O3、B2O3及BaO制备而成。In this example, the glass powder is made of PbO, Bi 2 O 3 , TeO 2 , SiO 2 , WO 3 , ZnO, CaO, MgO, Al 2 O 3 , Li 2 O, Na 2 O, Fe 2 O 3 , B 2 Prepared from O 3 and BaO.
其中，PbO的质量百分含量为27％，TeO2的质量百分含量为28％，Bi2O3的质量百分含量为26％，SiO2的质量百分含量为7.5％，ZnO的质量百分含量为2.5％，Na2O的质量百分含量为1％，Li2O的质量百分含量为1.5％，Al2O3的质量百分含量为1％，CaO的质量百分含量为0.5％，B2O3的质量百分含量为1％，Fe2O3的质量百分含量为0.5％，BaO的质量百分含量为0.5％，MgO的质量百分含量为0.5％，WO3的质量百分含量为2.5％。Wherein, the mass percentage of PbO is 27%, the mass percentage of TeO 2 is 28%, the mass percentage of Bi 2 O 3 is 26%, the mass percentage of SiO 2 is 7.5%, the mass percentage of ZnO The percentage content is 2.5%, the mass percentage content of Na2O is 1 %, the mass percentage content of Li2O is 1.5%, the mass percentage content of Al2O3 is 1 %, the mass percentage content of CaO 0.5%, the mass percentage of B2O3 is 1 %, the mass percentage of Fe2O3 is 0.5 %, the mass percentage of BaO is 0.5%, and the mass percentage of MgO is 0.5%, The mass percentage of WO 3 is 2.5%.
实施例3Example 3
本实施例中，玻璃粉由PbO、Bi2O3、TeO2、SiO2、WO3、ZnO、CaO、MgO、Al2O3、Li2O、Na2O、Fe2O3、B2O3及BaO制备而成。In this example, the glass powder is made of PbO, Bi 2 O 3 , TeO 2 , SiO 2 , WO 3 , ZnO, CaO, MgO, Al 2 O 3 , Li 2 O, Na 2 O, Fe 2 O 3 , B 2 Prepared from O 3 and BaO.
其中，PbO的质量百分含量为24％，TeO2的质量百分含量为26％，Bi2O3的质量百分含量为29％，SiO2的质量百分含量为8％，ZnO的质量百分含量为3％，Na2O的质量百分含量为0.5％，Li2O的质量百分含量为1.5％，Al2O3的质量百分含量为1％，CaO的质量百分含量为0.5％，B2O3的质量百分含量为1％，Fe2O3的质量百分含量为0.5％，BaO的质量百分含量为0.5％，MgO的质量百分含量为1％，WO3的质量百分含量为3.5％。Wherein, the mass percentage of PbO is 24%, the mass percentage of TeO 2 is 26%, the mass percentage of Bi 2 O 3 is 29%, the mass percentage of SiO 2 is 8%, the mass percentage of ZnO The percentage content is 3%, the mass percentage content of Na 2 O is 0.5%, the mass percentage content of Li 2 O is 1.5%, the mass percentage content of Al 2 O 3 is 1%, the mass percentage content of CaO 0.5%, the mass percentage of B2O3 is 1 %, the mass percentage of Fe2O3 is 0.5 %, the mass percentage of BaO is 0.5%, and the mass percentage of MgO is 1 %, The mass percentage of WO 3 is 3.5%.
实施例4Example 4
本实施例中，玻璃粉由PbO、Bi2O3、TeO2、SiO2、WO3、ZnO、CaO、MgO、Al2O3、Li2O、Na2O、Fe2O3、B2O3及BaO制备而成。In this example, the glass powder is made of PbO, Bi 2 O 3 , TeO 2 , SiO 2 , WO 3 , ZnO, CaO, MgO, Al 2 O 3 , Li 2 O, Na 2 O, Fe 2 O 3 , B 2 Prepared from O 3 and BaO.
其中，PbO的质量百分含量为21％，TeO2的质量百分含量为23％，Bi2O3的质量百分含量为33％，SiO2的质量百分含量为8.5％，ZnO的质量百分含量为3.5％，Na2O的质量百分含量为0.5％，Li2O的质量百分含量为2％，Al2O3的质量百分含量为1％，CaO的质量百分含量为0.5％，B2O3的质量百分含量为0.5％，Fe2O3的质量百分含量为0.3％，BaO的质量百分含量为0.2％，MgO的质量百分含量为1.5％，WO3的质量百分含量为4.5％。Wherein, the mass percentage of PbO is 21%, the mass percentage of TeO 2 is 23%, the mass percentage of Bi 2 O 3 is 33%, the mass percentage of SiO 2 is 8.5%, the mass percentage of ZnO The percentage content is 3.5%, the mass percentage content of Na2O is 0.5%, the mass percentage content of Li2O is 2 %, the mass percentage content of Al2O3 is 1 %, the mass percentage content of CaO 0.5%, the mass percentage of B 2 O 3 is 0.5%, the mass percentage of Fe 2 O 3 is 0.3%, the mass percentage of BaO is 0.2%, and the mass percentage of MgO is 1.5%, The mass percentage of WO 3 is 4.5%.
实施例5Example 5
本实施例中，玻璃粉由PbO、Bi2O3、TeO2、SiO2、WO3、ZnO、CaO、MgO、Al2O3、Li2O、Na2O、Fe2O3、B2O3及BaO制备而成。In this example, the glass powder is made of PbO, Bi 2 O 3 , TeO 2 , SiO 2 , WO 3 , ZnO, CaO, MgO, Al 2 O 3 , Li 2 O, Na 2 O, Fe 2 O 3 , B 2 Prepared from O 3 and BaO.
其中，PbO的质量百分含量为18％，TeO2的质量百分含量为21％，Bi2O3的质量百分含量为36％，SiO2的质量百分含量为9％，ZnO的质量百分含量为3.5％，Na2O的质量百分含量为0.5％，Li2O的质量百分含量为2.5％，Al2O3的质量百分含量为1％，CaO的质量百分含量为0.5％，B2O3的质量百分含量为0.5％，Fe2O3的质量百分含量为0.3％，BaO的质量百分含量为0.2％，MgO的质量百分含量为1.5％，WO3的质量百分含量为5.5％。Wherein, the mass percentage of PbO is 18%, the mass percentage of TeO 2 is 21%, the mass percentage of Bi 2 O 3 is 36%, the mass percentage of SiO 2 is 9%, the mass percentage of ZnO The percentage content is 3.5%, the mass percentage content of Na2O is 0.5%, the mass percentage content of Li2O is 2.5 %, the mass percentage content of Al2O3 is 1 %, the mass percentage content of CaO 0.5%, the mass percentage of B 2 O 3 is 0.5%, the mass percentage of Fe 2 O 3 is 0.3%, the mass percentage of BaO is 0.2%, and the mass percentage of MgO is 1.5%, The mass percentage of WO 3 is 5.5%.
将所述实施例1～5中所制得的玻璃粉与有机载体及银粉按照一定的比例充分混合制备正电极银浆。其中，该玻璃粉的质量百分含量为3％，该有机载体的质量百分含量为6％，该银粉的质量百分含量为91％。该有机载体由乙基纤维素、松油醇、聚丙烯酰胺、邻苯二甲酸甲酯、软磷脂和聚酰胺蜡组混合而成，其中，该乙基纤维素的质量百分含量为8％，该松油醇质量百分含量为75％，该聚丙烯酰胺质量百分含量为5％，该邻苯二甲酸甲酯质量百分含量为4％，该软磷脂质量百分含量为3％，该聚酰胺蜡质量百分含量为5％。该银粉由第一银粉和第二银粉组成，其中，该第一银粉的质量百分含量为15％，该第二银粉的质量百分含量为85％。将该正电极银浆通过丝网印刷的方式印刷到多晶硅电池片上，烘干烧结，即制得正电极。对该正电极的电性能及拉力性能进行测试，测试结果参见表一。The positive electrode silver paste was prepared by fully mixing the glass powder prepared in Examples 1-5 with the organic vehicle and silver powder according to a certain ratio. Wherein, the mass percentage of the glass powder is 3%, the mass percentage of the organic vehicle is 6%, and the mass percentage of the silver powder is 91%. The organic vehicle is formed by mixing ethyl cellulose, terpineol, polyacrylamide, methyl phthalate, lecithin and polyamide wax, wherein the mass percentage of the ethyl cellulose is 8% , the mass percentage of terpineol is 75%, the mass percentage of polyacrylamide is 5%, the mass percentage of methyl phthalate is 4%, and the mass percentage of lecithin is 3%. , the polyamide wax mass percent content is 5%. The silver powder is composed of a first silver powder and a second silver powder, wherein the mass percentage of the first silver powder is 15%, and the mass percentage of the second silver powder is 85%. The positive electrode silver paste is printed on the polysilicon battery sheet by screen printing, dried and sintered to obtain the positive electrode. The electrical properties and tensile properties of the positive electrode were tested, and the test results are shown in Table 1.
表一：正电极的电性能及拉力性能Table 1: Electrical properties and tensile properties of the positive electrode
其中，Uoc为负载开路电压，Isc为短路电流，Rs为串联电阻，FF为填充因子，Ncell为转换效率。Among them, Uoc is the open-circuit voltage of the load, Isc is the short-circuit current, Rs is the series resistance, FF is the fill factor, and Ncell is the conversion efficiency.
由表一可知，由本发明的玻璃粉制得的正电极银浆所制得的正电极具有较高的光电转换效率和较优的拉力性能。It can be seen from Table 1 that the positive electrode made from the positive electrode silver paste made from the glass frit of the present invention has higher photoelectric conversion efficiency and better tensile performance.
本发明的玻璃粉通过调整优化化学组成，一方面，降低了熔融玻璃液的表面张力，改善了玻璃液的润湿性能，从而提高了玻璃料的熔银析银能力，而纳米银的析出有助于玻璃层的多层隧道导电，可以保证正电极与多晶硅电池片之间形成良好的欧姆接触，从而使得制备的正电极银浆具备较高的光电转换效率；另一方面，还可以提高玻璃本身的结构强度，同时由于润湿性能的改善，玻璃过渡层厚度均匀，浆料在烧结后具备更高的拉力，从而使得制备的正电极银浆具备更优的拉力性能，保证了太阳能电池的使用寿命。By adjusting and optimizing the chemical composition of the glass frit of the present invention, on the one hand, it reduces the surface tension of the molten glass, improves the wettability of the glass, thereby improving the silver melting ability of the glass frit, and the precipitation of nano-silver is limited. It helps the multi-layer tunnel of the glass layer to conduct electricity, which can ensure a good ohmic contact between the positive electrode and the polysilicon cell, so that the prepared positive electrode silver paste has a high photoelectric conversion efficiency; on the other hand, it can also improve the glass. At the same time, due to the improvement of wetting performance, the thickness of the glass transition layer is uniform, and the paste has higher tensile force after sintering, so that the prepared positive electrode silver paste has better tensile performance and ensures the solar cell. service life.
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本发明，而并非用作为对本发明的限定，只要在本发明的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本发明要求保护的范围之内。Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Alterations and variations are within the scope of the claimed invention.
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2016
- 2016-09-20 CN CN201610834682.5A patent/CN106477897A/en active Pending
- 2016-10-31 TW TW105135207A patent/TW201813937A/en unknown
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