CN111732337B - 一种无铅玻璃组分以及含无铅玻璃组分的高焊接拉力的晶硅太阳能电池导电银浆 - Google Patents
一种无铅玻璃组分以及含无铅玻璃组分的高焊接拉力的晶硅太阳能电池导电银浆 Download PDFInfo
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- 229910052797 bismuth Inorganic materials 0.000 description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 238000003854 Surface Print Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
本发明公开了一种无铅玻璃组分，其中包括50‑80wt％的TeO2，5‑20wt％的V2O5，5‑15wt％的Li2CO3，5‑10wt％的Na2CO3，5‑15wt％的WO3，5‑15wt％的ZnO，小于5wt％的Ag2O和小于5wt％的MgO，以质量百分比计；以及一种高焊接拉力的晶硅太阳能电池导电银浆配方，其中包括80‑90wt％的银，1‑5wt％的如上所述的玻璃组分，7‑10wt％的有机载体，以质量百分比计。
Description
技术领域
本发明涉及一种无铅玻璃组分以及含有该玻璃组分的晶硅太阳能电池导电银浆，用于晶硅太阳能发电领域。
背景技术
太阳能电池发电技术近几年得到迅猛的发展，目前用于太阳能电池的导电浆料中含有较高成分的铅，主要来源于浆料中的玻璃组分，铅对环境和人体会带来污染和伤害，因此无铅的太阳能导电银浆是未来发展的一个方向。同时，本发明无铅的玻璃组分，因为其和硅片更为匹配的热膨胀系数和在硅片上良好的流动性，能够使导电银浆具有更高的焊接附着力，这有利于组件在室外长期使用的稳定性和可靠性。本发明中的玻璃组分中因为不含有铅，在TeO2-V2O5-Li2CO3-WO3-ZnO这个体系上，玻璃和硅片之间的热膨胀匹配更好，同时引入了较高和含量的Li，Na等增加玻璃化学活性的组分，使得该体系玻璃在不添加铅、铋等组分时，也能够很好的腐蚀掉太阳能电池硅片上的减反层。TeO2-V2O5组合能够良好的浸润银粉，使浆料在烧结过程中，玻璃中有溶入的银离子，在烧结末端冷却的时候，这些饱和的银离子从玻璃中析出，形成良好的欧姆接触。采用这种玻璃粉所制备的太阳能银浆，在电池性能方面表现出低Rs，高FF和较高的焊接拉力。
经检索，申请号为CN201611214904.X、名称为无铅玻璃粉、无铅玻璃粉浆料、大面积染料敏化太阳能电池及其制备方法和应用的发明专利申请方案，解决的技术问题是可提高导电银栅的耐腐蚀性，并且通过FTO导电玻璃四周的玻璃粉体将光阳极和对电极封接起来，通过整面印刷的方式，减少了孔洞的数量，简化封装工艺，可减慢电解液的泄漏，提高电池的寿命。采用的技术方案是，包括以下组分：SiO2 10～20％、B2O3 5～15％、Bi2O3 40～70％、ZnO 1～10％、Ai2O3 1～10％、Na2O 0.5～5％、BaO 1～5％和CaO 2～7％。本申请提供了一种不同于上述方案的技术。
发明内容
本发明为解决上述技术问题而采用的技术方案是提供一种无铅玻璃组分，采用这种玻璃组分制备的太阳能银浆，在电池性能方面表现出低Rs，高FF和较高的焊接拉力。其中，具体技术方案为：
按质量百分比组成，包括50-80wt％的TeO2，5-20wt％的V2O5，5-15wt％的Li2CO3，5-10wt％的Na2CO3，5-15wt％的WO3，5-15wt％的ZnO，小于5wt％的Ag2O和小于6wt％的MgO。
上述的无铅玻璃组分，其中，Li2CO3和Na2CO3的总含量不超过20wt％。
上述的无铅玻璃组分，其中，WO3和ZnO的总含量不超过20wt％。
上述的无铅玻璃组分，其中，Ag2O的含量范围是0.5-3wt％，
上述的无铅玻璃组分，其中，MgO的含量范围是0.5-5wt％。
一种含无铅玻璃组分的高焊接拉力的晶硅太阳能电池导电银浆，该导电银浆按质量百分比组成，其中，包括80-90wt％的银，1-5wt％的如权利 要求1所述的玻璃组分，7-10wt％的有机载体。
本发明相对于现有技术具有如下有益效果：
1)本发明中的玻璃组分中因为不含有铅，在TeO2-V2O5-Li2CO3-WO3-ZnO这个体系上，玻璃和硅片之间的热膨胀匹配更好，同时引入了较高和含量的Li，Na等增加玻璃化学活性的组分，使得该体系玻璃在不添加铅、铋等组分时，也能够很好的腐蚀掉太阳能电池硅片上的减反层。TeO2-V2O5组合能够良好的浸润银粉，使浆料在烧结过程中，玻璃中有溶入的银离子，在烧结末端冷却的时候，这些饱和的银离子从玻璃中析出，形成良好的欧姆接触。
2)本发明无铅的玻璃组分，因为其和硅片更为匹配的热膨胀系数和在硅片上良好的流动性，能够使导电银浆具有更高的焊接附着力，这有利于组件在室外长期使用的稳定性和可靠性。
3)采用这种玻璃组分制备的太阳能银浆，在电池性能方面表现出低Rs，高FF和较高的焊接拉力。
4)本发明的另一方面是提供了一种包含上述玻璃的可用于晶硅太阳能电池导电浆料的配方，该配方包括(按照质量百分比)：80-90wt％的银，1-5wt％的玻璃，7-10wt％的有机载体。上述优选的组合为85-90wt％的银，1.5-3wt％的玻璃，7-10wt％的有机载体。
具体实施方式
下面结合实施例对本发明作进一步的描述。
以下实例描述了以最佳方式实施本发明的情况，但不仅限于以下实例。玻璃组分如下表所示。
表1玻璃组分百分比
把准备好的玻璃样品GF1至GF4按照下表的太阳能银浆配方，进行称取后，充分混合后放入三辊机进行充分轧料，制成银浆。同时选用市购的含铅太阳能银浆用玻璃粉作为对比样G1和G2。
表2银浆配方百分比
表3是P1-P5浆料测试后的电性能参数及焊接拉力。
表3P1-P5浆料电性能参数
| 浆料 | Voc/mV | Isc/A | Rs/mOhm | FF/％ | Eff/％ | 焊接拉力/N |
| P1 | 632.6 | 9.146 | 2.02 | 79.31 | 18.81 | 3 |
| P2 | 632.9 | 9.151 | 2.05 | 79.33 | 18.83 | 2.8 |
| P3 | 631.6 | 9.148 | 2.01 | 79.35 | 18.79 | 3.3 |
| P4 | 632.2 | 9.142 | 2.03 | 79.29 | 18.78 | 3.1 |
| P5 | 632.8 | 9.142 | 2.07 | 79.28 | 18.83 | 1.5 |
| P6 | 633.1 | 9.141 | 2.11 | 79.23 | 18.81 | 1.4 |
虽然本发明已以较佳实施例揭示如上，然其并非用以限定本发明，任何本领域技术人员，在不脱离本发明的精神和范围内，当可作些许的修改和完善，因此本发明的保护范围当以权利要求书所界定的为准。
Claims (4)
1.一种无铅玻璃组分，其特征在于，按质量百分比，由50-65wt％的TeO2，5-20wt％的V2O5，5-15wt％的Li2CO3，5-10wt％的Na2CO3，5-15wt％的WO3，5-15wt％的ZnO，0.5-3wt％的Ag2O和0.5-5wt％的MgO组成。
2.按照权利要求1所述的无铅玻璃组分，其特征在于，其中Li2CO3和Na2CO3的总含量不超过20wt％。
3.按照权利要求1所述的无铅玻璃组分，其特征在于，其中WO3和ZnO的总含量不超过20wt％。
4.一种含有如权利要求1到权利要求3任一项所述的玻璃组分的高焊接拉力的晶硅太阳能电池导电银浆，其特征是，该导电银浆按质量百分比组成，其中，包括80-90wt％的银，1-5wt％的玻璃组分，7-10wt％的有机载体。
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