CN113257929A - 一种新型光伏电池 - Google Patents
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Abstract
本发明公开了一种新型光伏电池,包括:碳纳米管层,沉积在单晶硅衬底的顶部;二氧化硅隔离层,热氧化生长在碳纳米管层的表面;电极柱,对称焊接在二氧化硅隔离层的左右两端;背电极,包覆在单晶硅衬底的底部。本发明通过碳纳米管的使用,为光伏电池提供了强的背面场和高的导电率,增大了石墨与硅的接触面积,有利于提高光伏电池的效率,能够使光照的反射率大幅度降低,制备工艺简单,制造成本低,适合大范围的推广使用。
Description
本申请是名为《一种新型光伏电池及其制造方法》的专利申请的分案申请,原申请的申请日为2018年01月18日,申请号为201810047476.9。
技术领域
本发明涉及太阳能技术领域,特别是涉及一种新型光伏电池。
背景技术
光伏电池用于把太阳的光能直接转化为电能。目前地面光伏***大量使用的是以硅为基底的硅太阳能电池,可分为单晶硅、多晶硅、非晶硅太阳能电池。在能量转换效率和使用寿命等综合性能方面,单晶硅和多晶硅电池优于非晶硅电池。多晶硅比单晶硅转换效率低,但价格更便宜。常见的,铝以包含铝颗粒的形式印刷在太阳能电池的后表面上,并且在高温下退火。可供用于这些用途的铝浆料包括各种直径的铝颗粒,这些铝颗粒基本上是分散的,以实现高的封装密度,进而实现更佳的横向传导性。但是这种形式的导线性能不佳,热传导效率较低。为此,我们提出了一种新型光伏电池及其制造方法投入使用,以解决上述问题。
发明内容
本发明的目的是提供一种新型光伏电池,通过碳纳米管的使用,为光伏电池提供了强背面场和高导电率,提高了光伏电池的效率。
为实现上述目的,本发明提供了如下方案:
一种新型光伏电池,包括:
碳纳米管层(2),沉积在单晶硅衬底(1)的顶部;
二氧化硅隔离层(3),热氧化生长在碳纳米管层(2)的表面;
电极柱(5),对称焊接在二氧化硅隔离层(3)的左右两端;
背电极(4),包覆在单晶硅衬底(1)的底部;
所述新型光伏电池的制造方法,具体包括:
S1:取阳极直径8mm,阴极直径14mm的石墨棒,在石墨棒阳极端部钻孔,孔内填充金属混合物和石墨粉末,抽真空后,通入惰性气体,接通电源,放电4~6min后制得单壁碳纳米管;其中,在通入惰性气体时,气体压力不低于14000Pa;接通电源后,电流控制在90~100A,并保持石墨棒两极的电压为30V;
S2:将单壁碳纳米管溅射到单晶硅衬底(1)上,形成碳纳米管层(2);
S3:湿法蚀刻单晶硅衬底(1)背部氧化层,在氧化层上通过电子束蒸发金属作为背电极(4);
S4:在碳纳米管层(2)上通过热氧化生长二氧化硅,作为二氧化硅隔离层(3);
S5:将缓冲材料沉积到氧化锌纳米棒上,并焊接在二氧化硅隔离层(3)的左右两端,形成电极柱(5)。
可选的,所述单晶硅衬底(1)的表面均匀包覆有透明导电氧化物层,且单晶硅衬底(1)的厚度为5~20μm。
可选的,所述碳纳米管层(2)的内腔均匀排列有碳纳米管,且碳纳米管层(2)的厚度为3~10μm。
可选的,所述金属混合物为金属镍和金属钇的混合物,其中金属镍:金属钇=1.6:0.6。
可选的,所述惰性气体为氦气、氩气、氮气和氢气中的一种。
可选的,所述缓冲材料为二氧化钛、硫化铟和硫化锌中的一种。
根据本发明提供的具体实施例,本发明公开了以下技术效果:
本发明提供了一种新型光伏电池,包括:碳纳米管层,沉积在单晶硅衬底的顶部;二氧化硅隔离层,热氧化生长在碳纳米管层的表面;电极柱,对称焊接在二氧化硅隔离层的左右两端;背电极,包覆在单晶硅衬底的底部。本发明通过碳纳米管的使用,为光伏电池提供了强的背面场和高的导电率,增大了石墨与硅的接触面积,有利于提高光伏电池的效率,能够使光照的反射率大幅度降低,制备工艺简单,制造成本低,适合大范围的推广使用。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例所提供的新型光伏电池结构示意图;
其中:1单晶硅衬底、2碳纳米管层、3二氧化硅隔离层、4背电极、5电极柱。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明的目的是提供一种新型光伏电池,通过碳纳米管的使用,为光伏电池提供了强背面场和高导电率,提高了光伏电池的效率。
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1为本发明实施例所提供的新型光伏电池结构示意图,如图1所示,本发明提供了一种新型光伏电池,包括:
碳纳米管层2,沉积在单晶硅衬底1的顶部;
二氧化硅隔离层3,热氧化生长在碳纳米管层2的表面;
电极柱5,对称焊接在二氧化硅隔离层3的左右两端;
背电极4,包覆在单晶硅衬底1的底部;
此外,本申请提供的新型光伏电池中,单晶硅衬底1的表面均匀包覆有透明导电氧化物层,且单晶硅衬底1的厚度为5~20μm。碳纳米管层2的内腔均匀排列有碳纳米管,且碳纳米管层2的厚度为3~10μm。
具体的,本发明中所提供的新型光伏电池,制造方法如下:
步骤S1:取阳极直径8mm,阴极直径14mm的石墨棒,在石墨棒阳极端部钻孔,孔内填充金属混合物和石墨粉末,抽真空后,通入惰性气体,接通电源,放电4~6min后制得单壁碳纳米管;
具体的,在步骤S1中,在通入惰性气体时,气体压力不低于14000Pa;接通电源后,电流控制在90~100A,并保持石墨棒两极的电压为30V;金属混合物为金属镍和金属钇的混合物,其中金属镍:金属钇=1.6:0.6;惰性气体为氦气、氩气、氮气和氢气中的一种。
步骤S2:将单壁碳纳米管溅射到单晶硅衬底1上,形成碳纳米管层2;
步骤S3:湿法蚀刻单晶硅衬底1背部氧化层,在氧化层上通过电子束蒸发金属作为背电极4;
步骤S4:在碳纳米管层2上通过热氧化生长二氧化硅,作为二氧化硅隔离层3;
步骤S5:将缓冲材料沉积到氧化锌纳米棒上,并焊接在二氧化硅隔离层3的左右两端,形成电极柱5。其中,缓冲材料为二氧化钛、硫化铟和硫化锌中的一种。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处。综上所述,本说明书内容不应理解为对本发明的限制。
Claims (6)
1.一种新型光伏电池,其特征在于,所述新型光伏电池,包括:
碳纳米管层(2),沉积在单晶硅衬底(1)的顶部;
二氧化硅隔离层(3),热氧化生长在碳纳米管层(2)的表面;
电极柱(5),对称焊接在二氧化硅隔离层(3)的左右两端;
背电极(4),包覆在单晶硅衬底(1)的底部;
所述新型光伏电池的制造方法,具体包括:
S1:取阳极直径8mm,阴极直径14mm的石墨棒,在石墨棒阳极端部钻孔,孔内填充金属混合物和石墨粉末,抽真空后,通入惰性气体,接通电源,放电4~6min后制得单壁碳纳米管;其中,在通入惰性气体时,气体压力不低于14000Pa;接通电源后,电流控制在90~100A,并保持石墨棒两极的电压为30V;
S2:将单壁碳纳米管溅射到单晶硅衬底(1)上,形成碳纳米管层(2);
S3:湿法蚀刻单晶硅衬底(1)背部氧化层,在氧化层上通过电子束蒸发金属作为背电极(4);
S4:在碳纳米管层(2)上通过热氧化生长二氧化硅,作为二氧化硅隔离层(3);
S5:将缓冲材料沉积到氧化锌纳米棒上,并焊接在二氧化硅隔离层(3)的左右两端,形成电极柱(5)。
2.根据权利要求1所述的一种新型光伏电池,其特征在于,所述单晶硅衬底(1)的表面均匀包覆有透明导电氧化物层,且单晶硅衬底(1)的厚度为5~20μm。
3.根据权利要求1所述的一种新型光伏电池,其特征在于,所述碳纳米管层(2)的内腔均匀排列有碳纳米管,且碳纳米管层(2)的厚度为3~10μm。
4.根据权利要求1所述的新型光伏电池,其特征在于,所述金属混合物为金属镍和金属钇的混合物,其中金属镍:金属钇=1.6:0.6。
5.根据权利要求1所述的新型光伏电池,其特征在于,所述惰性气体为氦气、氩气、氮气和氢气中的一种。
6.根据权利要求1所述的新型光伏电池,其特征在于,所述缓冲材料为二氧化钛、硫化铟和硫化锌中的一种。
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