WO2023098038A1 - 一种钙钛矿太阳能电池的柱状电极结构的制备方法 - Google Patents

一种钙钛矿太阳能电池的柱状电极结构的制备方法 Download PDF

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WO2023098038A1
WO2023098038A1 PCT/CN2022/100361 CN2022100361W WO2023098038A1 WO 2023098038 A1 WO2023098038 A1 WO 2023098038A1 CN 2022100361 W CN2022100361 W CN 2022100361W WO 2023098038 A1 WO2023098038 A1 WO 2023098038A1
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electrode structure
transport layer
columnar electrode
carrier transport
layer
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PCT/CN2022/100361
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French (fr)
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肖平
许世森
赵志国
王力军
徐越
秦校军
刘家梁
李梦洁
熊继光
黄斌
汪强
赵东明
冯笑丹
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中国华能集团清洁能源技术研究院有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/549Organic PV cells

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  • the invention relates to the technical field of perovskite solar cells, in particular to a method for preparing a columnar electrode structure of a perovskite solar cell.
  • Perovskite solar cells are solar cells that use perovskite-type organic metal halide semiconductors as light-absorbing materials. They belong to the third generation of solar cells, also known as new concept solar cells.
  • the perovskite layer When the perovskite layer is irradiated by sunlight, it first absorbs photons to generate electron-hole pairs; due to the difference in the binding energy of excitons in perovskite materials, these carriers either become free carriers or form excitons, and, Because these perovskite materials tend to have lower carrier recombination probability and higher carrier mobility, the diffusion distance and lifetime of carriers are longer; then, these unrecombined electrons and holes are respectively
  • the electron transport layer and the hole transport layer are collected, that is, the electrons are transported from the perovskite layer to the electron transport layer, and finally collected by ITO, while the holes are transported from the perovskite layer to the hole transport layer, and finally collected by the metal electrode.
  • perovskite solar cells At present, the development status of perovskite solar cells is good, but the metal electrode part of perovskite solar cells in the prior art is mostly a planar structure, which requires the incident angle of incident light to be within a required range, which limits its application.
  • the technical problem solved by the present invention is to provide a method for preparing a columnar electrode structure of a perovskite solar cell.
  • the preparation method can prepare columnar electrodes to improve the photoelectric conversion efficiency of the perovskite cell, and has broad application prospects.
  • the application provides a method for preparing a columnar electrode structure of a perovskite solar cell, comprising the following steps:
  • the columnar electrode structure includes a metal electrode core layer and a first carrier transport layer arranged side by side of the metal electrode core layer.
  • the length of the first carrier transport layer is the same as that of the metal electrode core layer, or the height of the first carrier transport layer is lower than that of the metal electrode core layer.
  • the columnar electrode structure further includes an insulating layer that is side by side with the first carrier transport layer and contacts with the metal electrode core layer; or, the columnar electrode structure also includes an insulating layer that is connected to the first
  • the carrier transport layer is an insulating layer arranged side by side in sequence and in contact with the metal electrode core layer, and a second carrier transport layer.
  • the first current-carrying layer is deposited on the surface of the initial columnar electrode structure.
  • the sub-transport layer also includes:
  • the semiconductor material in the first carrier transport layer is an N-type semiconductor material or a P-type semiconductor material;
  • the N-type semiconductor material is selected from TiO 2 , fullerene, graphene, SnO 2 and ZnO One or more of;
  • the P-type semiconductor material is selected from one or more of NiO x , Cu 2 O, CuI, PTAA and CuSCN.
  • the metal material is selected from one or more of gold, silver, copper, iron, aluminum, cadmium, molybdenum and titanium.
  • the material of the insulating layer is selected from one or more of SiO 2 , Si 3 N 4 , beryllium oxide, boron nitride, aluminum nitride, aluminum oxide and barium tin borate.
  • the diameter of the columnar electrode structure is 100nm-500 ⁇ m, and the thickness of the first carrier transport layer and the insulating layer are both 5nm-100nm.
  • the etching method is laser etching
  • the deposition method is selected from vapor phase deposition or atomic layer deposition.
  • the present application provides a method for preparing a columnar electrode structure of a perovskite solar cell, comprising the following steps: firstly etching off metal materials outside the reserved position on a plane metal surface to obtain an initial columnar electrode structure; Deposit the first carrier transport layer on the surface of the initial columnar electrode structure to obtain the columnar electrode structure; this application uses the method of laser etching to prepare the initial columnar electrode structure, and then uses the method of surface deposition to deposit the first carrier transport layer , the resulting columnar electrode structure; this method can process a position on the surface of the thin electrode core layer that is conducive to the deposition of a carrier transport layer, and finally prepare a columnar electrode structure, thereby improving the photoelectric conversion efficiency of the perovskite battery .
  • Fig. 1 is the structural representation of the perovskite solar cell provided by the present invention
  • Fig. 2 is a schematic diagram of the columnar electrode structure provided by the present invention.
  • Figure 1 is a schematic structural view of a perovskite solar cell of the present invention, wherein 1 is a metal electrode core layer, 2 is an insulating layer, 3 is a first carrier transport layer, and 4 is a spherical perovskite layer , 5 is the TCO layer; in some embodiments, 1 and 2 constitute a columnar electrode structure, and in some embodiments, 1-3 constitute the columnar electrode structure described in this application.
  • the preparation method of the columnar electrode structure described in the present application includes the following steps:
  • the columnar electrode structure includes a metal electrode core layer and a first carrier transport layer arranged side by side of the metal electrode core layer.
  • the length of the first carrier transport layer is the same as that of the metal electrode core layer, as shown in the right figure in Figure 2; or, the height of the first carrier transport layer is lower than the The height of the first metal electrode core layer, as shown in the left diagram in Figure 2.
  • the first step of the columnar electrode structure is to etch away the metal material outside the reserved position on the planar metal surface, leaving only the remaining columnar part;
  • the position of the metal material is the position of the first carrier transport layer; further deposition is performed.
  • the columnar conductive structure further includes an insulating layer and a second carrier transport layer, it includes an insulating layer that is arranged side by side with the first carrier transport layer, or further includes an insulating layer next to the first carrier transport layer.
  • the side-by-side insulating layer and the second carrier transport layer can also be provided with an insulating layer, a second carrier transport layer in sequence on the basis of the above-mentioned second carrier transport layer according to actual needs, such as a spherical laminated battery or a spherical multi-junction battery.
  • Three carrier transport layers ⁇ .
  • the preparation method of the columnar electrode structure specifically includes: etching away the metal material outside the reserved position on the planar metal surface , the position of the metal material is the position of the first carrier transport layer; then deposit the first carrier transport layer; then etch away the metal material outside the reserved position on the plane metal surface, the metal The position described in the material is the insulating layer side by side with the first carrier transport layer, and the insulating layer is deposited last.
  • the specific position of the preparation method of the columnar electrode structure is: etching away the reserved position on the plane metal surface
  • the metal material, the position of the metal material is the position of the first carrier transport layer; then deposit the first carrier transport layer; and then etch away the metal material outside the reserved position on the plane metal surface, this
  • the position described in the metal material at the time is the insulating layer parallel to the first carrier transport layer, and then deposit the insulating layer; then etch away the metal material outside the reserved position on the plane metal surface, the metal material at this time
  • the said position is the second carrier transport layer parallel to the insulating layer, and then deposit the second carrier transport layer.
  • the columnar electrode structure further includes an insulating layer and a third carrier transport layer, subsequent etching-deposition is performed in sequence.
  • the metal material is selected from one or more metal materials selected from gold, silver, copper, iron, aluminum, cadmium, molybdenum and titanium.
  • the semiconductor material in the first carrier transport layer is an N-type semiconductor material or a P-type semiconductor material; the N-type semiconductor material is selected from one of TiO 2 , fullerene, graphene, SnO 2 and ZnO or more; the P-type semiconductor material is selected from one or more of NiO x , Cu 2 O, CuI, PTAA and CuSCN.
  • the second carrier transport layer and the third carrier transport layer are independently selected according to the above-mentioned materials.
  • the material of the insulating layer is selected from one or more of SiO 2 , Si 3 N 4 , beryllium oxide, boron nitride, aluminum nitride, aluminum oxide and barium tin borate.
  • the diameter of the columnar electrode structure is 100 nm to 500 ⁇ m, and the thickness of the first carrier transport layer and the insulating layer are both 5 nm to 100 nm.
  • the etching is selected from laser etching, and its specific operation is carried out according to a method well known to those skilled in the art, and this application is not particularly limited; the deposition is specifically vapor deposition or Atomic layer deposition, similarly, the gas phase deposition or atomic layer deposition is according to methods well known to those skilled in the art, and there is no particular limitation in this application.
  • the present application provides a method for preparing a columnar electrode structure of a perovskite solar cell, comprising the following steps: firstly etching off metal materials outside the reserved position on a plane metal surface to obtain an initial columnar electrode structure; Deposit the first carrier transport layer on the surface of the initial columnar electrode structure to obtain the columnar electrode structure; this application uses the method of laser etching to prepare the initial columnar electrode structure, and then uses the method of surface deposition to deposit the first carrier transport layer , the resulting columnar electrode structure; this method can process a position on the surface of the thin electrode core layer that is conducive to the deposition of a carrier transport layer, and finally prepare a columnar electrode structure, thereby improving the photoelectric conversion efficiency of the perovskite battery .
  • Laser etching is used to etch away the metal material outside the reserved position on the plane metal (copper) surface (the reserved position is the same height as the partition to be formed);
  • a layer of N-type semiconductor material (specifically SnO 2 ) is deposited by magnetron sputtering at the etched position, and its thickness is 60nm to obtain a columnar structure with a metal electrode core layer and an N-type semiconductor material layer (electron transport layer). electrode structure.
  • a magnetron sputtering method is used to deposit a A layer of N-type semiconductor material (specifically SnO 2 ), the thickness of which is 60nm;
  • laser etching is used to etch away the metal material outside the reserved position again (the reserved position is the same height as the partition to be formed); a layer of insulating material is deposited by magnetron sputtering on the etched position.
  • layer material specifically SiO 2
  • layer material with a thickness of 60 nm, resulting in a columnar electrode structure with a metal electrode core layer, an N-type semiconductor material (electron transport layer) and an insulating layer.
  • a magnetron sputtering method is used to deposit a A layer of N-type semiconductor material (specifically SnO 2 ), the thickness of which is 60nm;
  • laser etching is used to etch away the metal material outside the reserved position again (the reserved position is the same height as the partition to be formed); a layer of insulating material is deposited by magnetron sputtering on the etched position.
  • layer material specifically SiO 2 ), the thickness of which is 60 nm;

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Abstract

本发明提供了一种钙钛矿太阳能电池的柱状电极结构的制备方法,包括以下步骤:其首先在平面金属表面刻蚀掉预留位置外的金属材料,得到初始柱状电极结构;再在所述初始柱状电极结构表面沉积第一载流子传输层,得到柱状电极结构;本申请利用激光刻蚀的方法制备了初始柱状电极结构,再利用表面沉积的方法,沉积了第一载流子传输层,由此得到的柱状电极结构;该方法能够在纤细的电极芯层表面加工出利于沉积载流子传输层的位置,最终制备得到柱状电极结构,由此制备的钙钛矿电池具有较高的光电转换效率。

Description

一种钙钛矿太阳能电池的柱状电极结构的制备方法
本申请要求于2021年12月01日提交中国专利局、申请号为202111456016.X、发明名称为“一种钙钛矿太阳能电池的柱状电极结构的制备方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及钙钛矿太阳能电池技术领域,尤其涉及钙钛矿太阳能电池的柱状电极结构的制备方法。
背景技术
钙钛矿型太阳能电池(perovskite solar cells),是利用钙钛矿型的有机金属卤化物半导体作为吸光材料的太阳能电池,属于第三代太阳能电池,也称作新概念太阳能电池。
钙钛矿层在接受太阳光照射时,首先吸收光子产生电子-空穴对;由于钙钛矿材激子束缚能的差异,这些载流子或者成为自由载流子,或者形成激子,而且,因为这些钙钛矿材料往往具有较低的载流子复合几率和较高的载流子迁移率,所以载流子的扩散距离和寿命较长;然后,这些未复合的电子和空穴分别被电子传输层和空穴传输层收集,即电子从钙钛矿层传输到电子传输层,最后被ITO收集,而空穴从钙钛矿层传输到空穴传输层,最后被金属电极收集。当然,这些过程中总不免伴随着一些载流子的损失,如电子传输层的电子与钙钛矿层空穴的可逆复合、电子传输层的电子与空穴传输层的空穴的复合(钙钛矿层不致密的情况)、钙钛矿层的电子与空穴传输层的空穴的复合,因此要提高电池的整体性能,这些载流子的损失应该降到最低;最后,通过连接FTO和金属电极的电路而产生光电流。
目前,钙钛矿太阳能电池发展现状良好,但现有技术中钙钛矿太阳能电池的金属电极部分多为平面结构,其要求入射光的入射角度在一个需要范围内,这样限制了其应用。
发明内容
本发明解决的技术问题在于提供一种钙钛矿太阳能电池的柱状电极结构的制备方法,该制备方法可制备柱状电极,以提高钙钛矿电池的光电转换效率,具有广阔的应用前景。
有鉴于此,本申请提供了一种钙钛矿太阳能电池的柱状电极结构的制备方法,包括以下步骤:
在平面金属表面刻蚀掉预留位置外的金属材料,得到初始柱状电极结构;
在所述初始柱状电极结构表面沉积第一载流子传输层,得到柱状电极结构;
所述柱状电极结构包括金属电极芯层和并排设置在所述金属电极芯层侧面的第一载流子传输层。
优选的,所述第一载流子传输层与所述金属电极芯层的长度相同,或所述第一载流子传输层的高度低于所述金属电极芯层的高度。
优选的,所述柱状电极结构中还包括与所述第一载流子传输层并排且与所述金属电极芯层接触的绝缘层;或,所述柱状电极结构中还包括与所述第一载流子传输层依次并排排列且与所述金属电极芯层接触的绝缘层、第二载流子传输层。
优选的,在所述柱状电极结构中还包括与所述第一载流子传输层并排且与所述金属电极芯层接触的绝缘层时,在所述初始柱状电极结构表面沉积第一载流子传输层之后还包括:
在平面金属表面刻蚀掉预留位置外的金属材料,再沉积绝缘层。
优选的,所述第一载流子传输层中的半导体材料为N型半导体材料或P型半导体材料;所述N型半导体材料选自TiO 2、富勒烯、石墨烯、SnO 2和ZnO中的一种或多种;所述P型半导体材料选自NiO x、Cu 2O、CuI、PTAA和CuSCN一种或多种。
优选的,所述金属材料选自金、银、铜、铁、铝、镉、钼和钛中的一种或多种。
优选的,所述绝缘层的材料选自SiO 2、Si 3N 4、氧化铍、氮化硼、氮化铝、氧化铝和硼酸锡钡中的一种或多种。
优选的,所述柱状电极结构的直径为100nm~500μm,所述第一载流子传 输层与绝缘层的厚度均为5nm~100nm。
优选的,所述刻蚀的方法为激光刻蚀,所述沉积的方法选自气相沉积或原子层沉积。
本申请提供了一种钙钛矿太阳能电池的柱状电极结构的制备方法,包括以下步骤:其首先在平面金属表面刻蚀掉预留位置外的金属材料,得到初始柱状电极结构;再在所述初始柱状电极结构表面沉积第一载流子传输层,得到柱状电极结构;本申请利用激光刻蚀的方法制备了初始柱状电极结构,再利用表面沉积的方法,沉积了第一载流子传输层,由此得到的柱状电极结构;该方法能够在纤细的电极芯层表面加工出利于沉积载流子传输层的位置,最终制备得到柱状电极结构,由此提高了钙钛矿电池的光电转换效率。
附图说明
图1为本发明提供的钙钛矿太阳能电池的结构示意图;
图2为本发明提供的柱状电极结构示意图。
具体实施方式
为了进一步理解本发明,下面结合实施例对本发明优选实施方案进行描述,但是应当理解,这些描述只是为进一步说明本发明的特征和优点,而不是对本发明权利要求的限制。
如图1所示,图1为本发明钙钛矿太阳能电池的结构示意图,其中,1为金属电极芯层,2为绝缘层,3为第一载流子传输层,4为球状钙钛矿层,5为TCO层;在某些实施例中,1、2构成柱状电极结构,在某些实施例中,1~3构成了本申请的所述的柱状电极结构。
具体的,本申请所述柱状电极结构的制备方法,包括以下步骤:
在平面金属表面刻蚀掉预留位置外的金属材料,得到初始柱状电极结构;
在所述初始柱状电极结构表面沉积第一载流子传输层,得到柱状电极结构;
所述柱状电极结构包括金属电极芯层和并排设置在所述金属电极芯层侧面的第一载流子传输层。
在本申请中,所述第一载流子传输层与所述金属电极芯层的长度相同,如图2中的右图;或,所述第一载流子传输层的高度低于所述第一金属电极芯层的高度,如图2中的左图。
在柱状电极结构中仅包括第一载流子传输层的方案中,所述柱状电极结构的第一步操作是在平面金属表面刻蚀掉预留位置外的金属材料,只保留剩余柱状部分;金属材料所处的位置即为第一载流子传输层的位置;再进行沉积。
在所述柱状导电结构中还包括绝缘层和第二载流子传输层的方案中,包括与第一载流子传输层并排的绝缘层,或,还包括依次与第一载流子传输层并排的绝缘层和第二载流子传输层,还可根据实际需要,比如球状叠层电池或球状多结电池,在上述第二载流子传输层的基础上更依次设置有绝缘层、第三载流子传输层·····。
按照上述说明,在柱状电极结构中仅包括第一载流子传输层和绝缘层的基础上,所述柱状电极结构的制备方法具体为:在平面金属表面刻蚀掉预留位置外的金属材料,金属材料所处的位置即为第一载流子传输层的位置;再沉积第一载流子传输层;然后再在平面金属表面刻蚀掉预留位置外的金属材料,此时的金属材料所述的位置即为与第一载流子传输层并排的绝缘层,最后沉积绝缘层。
在柱状电极结构中包括第一载流子传输层、绝缘层和第二载流子传输层的方案中,所述柱状电极结构的制备方法具体位置:在平面金属表面刻蚀掉预留位置外的金属材料,金属材料所处的位置即为第一载流子传输层的位置;再沉积第一载流子传输层;然后再在平面金属表面刻蚀掉预留位置外的金属材料,此时的金属材料所述的位置即为与第一载流子传输层并排的绝缘层,再沉积绝缘层;然后再在平面金属表面刻蚀掉预留位置外的金属材料,此时的金属材料所述的位置即为与绝缘层并排的第二载流子传输层,再沉积第二载流子传输层。
同样,按照上述说明,在柱状电极结构中还包括绝缘层和第三载流子传输层的方案时,则依次进行后续的刻蚀-沉积。
在上述过程中,所述金属材料选自金属材料选自金、银、铜、铁、铝、镉、钼和钛中的一种或多种。所述第一载流子传输层中的半导体材料为N型半导 体材料或P型半导体材料;所述N型半导体材料选自TiO 2、富勒烯、石墨烯、SnO 2和ZnO中的一种或多种;所述P型半导体材料选自NiO x、Cu 2O、CuI、PTAA和CuSCN一种或多种。同样的第二载流子传输层、第三载流子传输层按照上述材料独自选择。所述绝缘层的材料选自SiO 2、Si 3N 4、氧化铍、氮化硼、氮化铝、氧化铝和硼酸锡钡中的一种或多种。
在本申请中,所述柱状电极结构的直径为100nm~500μm,所述第一载流子传输层与绝缘层的厚度均为5nm~100nm。
按照本发明,在上述制备过程中,所述刻蚀选自激光刻蚀,其具体操作按照本领域技术人员熟知的方法进行,对此本申请没有特别的限制;所述沉积具体为气相沉积或原子层沉积,同样的,所述气相沉积或原子层沉积按照本领域技术人员熟知的方法,对此本申请没有特别的限制。
本申请提供了一种钙钛矿太阳能电池的柱状电极结构的制备方法,包括以下步骤:其首先在平面金属表面刻蚀掉预留位置外的金属材料,得到初始柱状电极结构;再在所述初始柱状电极结构表面沉积第一载流子传输层,得到柱状电极结构;本申请利用激光刻蚀的方法制备了初始柱状电极结构,再利用表面沉积的方法,沉积了第一载流子传输层,由此得到的柱状电极结构;该方法能够在纤细的电极芯层表面加工出利于沉积载流子传输层的位置,最终制备得到柱状电极结构,由此提高了钙钛矿电池的光电转换效率。
为了进一步理解本发明,下面结合实施例对本发明提供的柱状电极结构的制备方法进行详细说明,本发明的保护范围不受以下实施例的限制。
实施例1
在平面金属(铜)表面采用激光刻蚀法刻蚀掉预留位置外的金属材料(预留的位置与待形成的分区高度相同);
在刻蚀掉的位置采用磁控溅射法沉积一层N型半导体材料(具体为SnO 2),其厚度为60nm,得到有金属电极芯层和N型半导体材料层(电子传输层)的柱状电极结构。
实施例2
在平面金属(铜)表面采用激光刻蚀法刻蚀掉预留位置外的金属材料(预留的位置与待形成的分区高度相同);在刻蚀掉的位置采用磁控溅射法沉积一 层N型半导体材料(具体为SnO 2),其厚度为60nm;
在此基础上采用激光刻蚀法再次刻蚀掉预留位置外的金属材料(预留的位置与待形成的分区高度相同);在刻蚀掉的位置采用磁控溅射法沉积一层绝缘层材料(具体为SiO 2),其厚度为60nm,得到有金属电极芯层、N型半导体材料(电子传输层)和绝缘层的柱状电极结构。
实施例3
在平面金属(铜)表面采用激光刻蚀法刻蚀掉预留位置外的金属材料(预留的位置与待形成的分区高度相同);在刻蚀掉的位置采用磁控溅射法沉积一层N型半导体材料(具体为SnO 2),其厚度为60nm;
在此基础上采用激光刻蚀法再次刻蚀掉预留位置外的金属材料(预留的位置与待形成的分区高度相同);在刻蚀掉的位置采用磁控溅射法沉积一层绝缘层材料(具体为SiO 2),其厚度为60nm;
再在上述电极结构基础上采用激光刻蚀法刻蚀掉预留位置外的金属材料(预留的位置与待形成的分区高度相同);在刻蚀掉的位置采用化学气相沉积法,以碘化亚铜饱和溶液作为前驱溶液,沉积一层P型半导体材料(具体为CuI),其厚度为60nm,得到有金属电极芯层、N型半导体材料(电子传输层)、绝缘层和P型半导体材料(空穴传输层)的柱状电极结构。
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。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (9)

  1. 一种钙钛矿太阳能电池的柱状电极结构的制备方法,包括以下步骤:
    在平面金属表面刻蚀掉预留位置外的金属材料,得到初始柱状电极结构;
    在所述初始柱状电极结构表面沉积第一载流子传输层,得到柱状电极结构;
    所述柱状电极结构包括金属电极芯层和并排设置在所述金属电极芯层侧面的第一载流子传输层。
  2. 根据权利要求1所述的制备方法,其特征在于,所述第一载流子传输层与所述金属电极芯层的长度相同,或所述第一载流子传输层的高度低于所述金属电极芯层的高度。
  3. 根据权利要求2所述的制备方法,其特征在于,所述柱状电极结构中还包括与所述第一载流子传输层并排且与所述金属电极芯层接触的绝缘层;或,所述柱状电极结构中还包括与所述第一载流子传输层依次并排排列且与所述金属电极芯层接触的绝缘层、第二载流子传输层。
  4. 根据权利要求3所述的制备方法,其特征在于,在所述柱状电极结构中还包括与所述第一载流子传输层并排且与所述金属电极芯层接触的绝缘层时,在所述初始柱状电极结构表面沉积第一载流子传输层之后还包括:
    在平面金属表面刻蚀掉预留位置外的金属材料,再沉积绝缘层。
  5. 根据权利要求1所述的制备方法,其特征在于,所述第一载流子传输层中的半导体材料为N型半导体材料或P型半导体材料;所述N型半导体材料选自TiO 2、富勒烯、石墨烯、SnO 2和ZnO中的一种或多种;所述P型半导体材料选自NiO x、Cu 2O、CuI、PTAA和CuSCN一种或多种。
  6. 根据权利要求1所述的制备方法,其特征在于,所述金属材料选自金、银、铜、铁、铝、镉、钼和钛中的一种或多种。
  7. 根据权利要求3或4所述的制备方法,其特征在于,所述绝缘层的材料选自SiO 2、Si 3N 4、氧化铍、氮化硼、氮化铝、氧化铝和硼酸锡钡中的一种或多种。
  8. 根据权利要求1所述的制备方法,其特征在于,所述柱状电极结构的 直径为100nm~500μm,所述第一载流子传输层与绝缘层的厚度均为5nm~100nm。
  9. 根据权利要求1~8任一项所述的制备方法,其特征在于,所述刻蚀的方法为激光刻蚀,所述沉积的方法选自气相沉积或原子层沉积。
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