CN111276280A - 一种用于晶体硅太阳能电池的含铟背场铝浆及其制备方法 - Google Patents
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Abstract
本发明公开了一种用于晶体硅太阳能电池的含铟背场铝浆及其制备方法,所述背场铝浆包括以下重量份的组分:铝粉70‑75份、玻璃粉5‑10份、有机载体10‑15份和铟粉3‑5份,所述铝粉的粒径为5μm以下、玻璃粉的粒径介于为2000目‑8000目、铟粉的粒径为10μm以下。本发明所述的用于晶体硅太阳能电池的含铟背场铝浆及其制备方法所采用的电解法制备的高纯铟微粉,可以有效提高硅太阳能电池的光电转化效率,操作简单,成本低,能够进一步拓展硅太阳能电池的应用领域,使用本发明所述的含铟背场铝浆制作的太阳能电池可用于航空航天产业,也可以用于民用建筑等产业。
Description
技术领域
本发明涉及太阳能电池材料技术领域,具体涉及一种用于晶体硅太阳能电池的含铟背场铝浆及其制备方法。
背景技术
太阳能电池是通过光电效应或者光化学效应直接把光能转化成电能的装置。在硅太阳能电池生产工艺中,背电极制作是非常重要的工序。背电极金属铝浆经由丝网印刷并经隧道炉快速热处理后,可以在太阳能电池硅片的背阳面形成铝背场(简称BSF),提高开路电压(Voc)。同时,烧结过程中形成硅-铝合金可以消除硅片与电极之间的肖特基势垒,实现良好的欧姆接触,从而提高太阳能电池的转化效率。但现有太阳能电池的光电转化效率依然有待于提高,应用领域有限。
发明内容
本发明针对以上问题的提出,而研究设计一种用于晶体硅太阳能电池的含铟背场铝浆及其制备方法。本发明采用的技术手段如下:
一种用于晶体硅太阳能电池的含铟背场铝浆,包括以下重量份的组分:铝粉70-75份、玻璃粉5-10份、有机载体10-15份和铟粉3-5份,所述铝粉的粒径为5μm以下、玻璃粉的粒径为2000目-8000目、铟粉的粒径为10μm以下。
进一步地,所述铟粉的制备方法为以钛为阴极,铟为阳极,以硫酸铟和稀硫酸的混合液作为电解液,在直流电作用下进行电解,制备铟粉。
进一步地,所述电解液中硫酸铟的浓度为0.2mol/L,所述电解液的pH值为2.5-3.0。
进一步地,所述稀硫酸的浓度为0.1mol/L,电解温度为15-25℃。
进一步地,所述有机载体为12-16个碳原子的烃类。
一种用于晶体硅太阳能电池的含铟背场铝浆的制备方法,将本发明所述的组分混合,将混合物进行烧结,形成背场铝浆。
进一步地,烧结的方式为真空烧结。
与现有技术比较,本发明所述的用于晶体硅太阳能电池的含铟背场铝浆及其制备方法所采用的电解法制备的高纯铟微粉,可以有效提高硅太阳能电池的光电转化效率,操作简单,成本低,能够进一步拓展硅太阳能电池的应用领域,使用本发明所述的含铟背场铝浆制作的太阳能电池可用于航空航天产业,也可以用于民用建筑等产业。
具体实施方式
一种用于晶体硅太阳能电池的含铟背场铝浆,包括以下重量份的组分:铝粉70-75份、玻璃粉5-10份、有机载体10-15份和铟粉3-5份,所述铝粉的粒径为5μm以下、玻璃粉的粒径介于2000目-8000目、铟粉的粒径为10μm以下。
所述铟粉的制备方法为将钛板做阴极,铟板做阳极,硫酸铟和稀H2SO4混合,在直流电作用下电解,制备直径小于10μm的铟微粉。采用此方法制备的铟微粉,具有不规则的几何形状以及松散的结构,比表面积大。
所述电解液中硫酸铟的浓度为0.2mol/L,所述电解液的pH值为2.5-3.0。
所述稀硫酸的浓度为0.1mol/L,电解温度为15-25℃。
所述有机载体以12-16个碳原子的烃类为主。
一种用于晶体硅太阳能电池的含铟背场铝浆的制备方法,将本实施例所述的组分混合,将混合物进行烧结,形成背场铝浆。具体地,包括以下步骤:
1)高纯铟微粉的制备步骤:将钛板做阴极,铟板做阳极,硫酸铟和稀H2SO4混合,在直流电作用下电解,制备直径小于10μm的铟微粉。采用此方法制备的铟微粉,具有不规则的几何形状以及松散的结构,比表面积大。较大比表面积的铟微粉可以进一步降低玻璃粉的熔点,增强玻璃粉与铝粉的粘结作用,由此降低P+层方阻和减少电池片漏流,提高电池片转化效率。
2)背场铝浆原料配比及混合步骤:将超细玻璃粉(粒度2000目-8000目之间)、金属导电铝粉,有机载体和电解法制备高纯铟微粉等原料按照一定的质量比混合;混合比例为超细玻璃粉5-10份、金属导电铝粉70-75%份、有机载体10-15份、电解制备的高纯铟微粉3-5份;
3)背场铝浆烧结步骤:将步骤2)中混合得到的背场铝浆原料,采用烧结技术烧结,形成外观平整、结合力强、导电能力好的背场铝浆。烧结的方式为真空烧结,避免金属氧化。
实施例1
采用超细玻璃粉10%、金属导电铝粉70%、有机载体15%、电解制备的高纯铟微粉5%,烧结制备的多晶硅太阳电池背场铝浆,其光电转换效率为17.2%,高于不含铟背场铝浆太阳能电池光电转化效率2.2%。本实施例所有百分数均为质量百分含量。
实施例2
采用超细玻璃粉10%、金属导电铝粉75%、有机载体12%、电解制备的高纯铟微粉3%,烧结制备的多晶硅太阳电池背场铝浆,其光电转换效率为16.8%,高于不含铟背场铝浆太阳能电池光电转化效率1.8%。本实施例所有百分数均为质量百分含量。
实施例3
采用超细玻璃粉5%、金属导电铝粉75%、有机载体15%份、电解制备的高纯铟微粉5%,烧结制备的多晶硅太阳电池背场铝浆,其光电转换效率为17.9%,高于不含铟背场铝浆太阳能电池光电转化效率2.9%。本实施例所有百分数均为质量百分含量。
实施例4
采用超细玻璃粉10%、金属导电铝粉75%、有机载体10%份、电解制备的高纯铟微粉5%,烧结制备的多晶硅太阳电池背场铝浆,其光电转换效率为17.3%,高于不含铟背场铝浆太阳能电池光电转化效率2.3%。本实施例所有百分数均为质量百分含量。
以上所述的实施例仅仅是对本发明的优选实施方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案做出的各种变形和改进,均应落入本发明权利要求书确定的保护范围内。
Claims (7)
1.一种用于晶体硅太阳能电池的含铟背场铝浆,其特征在于,包括以下重量份的组分:铝粉70-75份、玻璃粉5-10份、有机载体10-15份和铟粉3-5份,所述铝粉的粒径为5μm以下、玻璃粉的粒径为2000目-8000目、铟粉的粒径为10μm以下。
2.根据权利要求1所述的用于晶体硅太阳能电池的含铟背场铝浆,其特征在于,所述铟粉的制备方法为以钛为阴极,铟为阳极,以硫酸铟和稀硫酸的混合液作为电解液,在直流电作用下进行电解,制备铟粉。
3.根据权利要求2所述的用于晶体硅太阳能电池的含铟背场铝浆,其特征在于,所述电解液中硫酸铟的浓度为0.2mol/L,所述电解液的pH值为2.5-3.0。
4.根据权利要求3所述的用于晶体硅太阳能电池的含铟背场铝浆,其特征在于,所述稀硫酸的浓度为0.1mol/L,电解温度为15-25℃。
5.根据权利要求1所述的用于晶体硅太阳能电池的含铟背场铝浆,其特征在于,所述有机载体为12-16个碳原子的烃类。
6.一种用于晶体硅太阳能电池的含铟背场铝浆的制备方法,其特征在于,将权利要求1至5中任意一项所述的组分混合,将混合物进行烧结,形成背场铝浆。
7.根据权利要求6所述的用于晶体硅太阳能电池的含铟背场铝浆的制备方法,其特征在于,烧结的方式为真空烧结。
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CN110120274A (zh) * | 2019-06-05 | 2019-08-13 | 苏州晶银新材料股份有限公司 | 一种全铝背场的背电极浆料及其制备方法和应用 |
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