Perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of high transmission resistance of ZnO thin films, unstable perovskite thin films, low density of thin films, etc. dense effect

Active Publication Date: 2020-11-06
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a kind of perovskite solar cell and its preparation method, to solve the problem that the connection between ZnO particles in the ZnO thin film prepared by solution chemical method is not tight enough, thin film Low density, distribution of pinholes, residual hydroxyl groups on the surface and other factors lead to technical problems such as large transmission resistance of ZnO film, large bypass current and instability of perovskite film

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  • Perovskite solar cell and preparation method thereof
  • Perovskite solar cell and preparation method thereof
  • Perovskite solar cell and preparation method thereof

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preparation example Construction

[0020] On the other hand, based on the above-mentioned perovskite solar cell, the embodiment of the present invention also provides a preparation method of the above-mentioned perovskite solar cell. The preparation method of the perovskite solar cell comprises the following steps:

[0021] Form a film on a conductive substrate with ZnO nano-sol containing zinc acetylacetonate, and then anneal at a temperature not higher than 150°C.

[0022] Wherein, in one embodiment, the ZnO nano-sol is prepared according to the following method: dispersing ZnO nanoparticles and zinc acetylacetonate in a liquid medium. In this way, the ZnO nanoparticles and zinc acetylacetonate can be uniformly dispersed in the sol. In a further embodiment, the concentration of the ZnO nanoparticles in the ZnO nanosol is controlled to be 1-20 mg / mL. In another embodiment, the molar ratio of the zinc acetylacetonate to the ZnO is 1:(5˜1000). Like this, by controlling the content and the concentration thereo...

Embodiment 1

[0030] This embodiment provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell in this embodiment includes a conductive substrate and an electron transport layer stacked and bonded on the surface of the conductive substrate, wherein the electron transport layer is formed by annealing at 150°C with a film layer containing ZnO nanoparticles and zinc acetylacetonate . The thickness of the electron transport layer is about 30nm, and the molar ratio between zinc acetylacetonate and ZnO contained in the electron transport layer is 1:10.

[0031] The preparation method of the perovskite solar cell of the present embodiment comprises the following steps:

[0032] S11. Preparation of ZnO nano-sol: Weigh 2.195g of zinc acetate dihydrate and add it to 100mL of methanol, stir and dissolve at 60°C, and dissolve 50mL of potassium hydroxide with a concentration of 0.35mol / L at 60°C under continuous stirring The methanol solution was added dropwise to th...

Embodiment 2

[0046] This embodiment provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell in this embodiment includes a conductive substrate and an electron transport layer stacked and bonded on the surface of the conductive substrate, wherein the electron transport layer is formed by annealing at 150°C with a film layer containing ZnO nanoparticles and zinc acetylacetonate . The thickness of the electron transport layer is about 30nm, and the molar ratio between zinc acetylacetonate and ZnO contained in the electron transport layer is 1:10.

[0047] The preparation method of the perovskite solar cell of the present embodiment comprises the following steps:

[0048] S21. Same as step S11 in Embodiment 1.

[0049] S22. Same as step S12 in Embodiment 1.

[0050] S23. Spin-coat the ZnO sol containing zinc acetylacetonate prepared in step S22 on the cleaned ITO-PEN flexible conductive substrate at a speed of 3000rpm for 30s, and finally anneal the samp...

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Abstract

The invention discloses a perovskite solar cell and a preparation method thereof. The conductive substrate of the perovskite solar cell, and the electron transport layer formed on the conductive substrate; the electron transport layer is formed by annealing a film layer containing ZnO and zinc acetylacetonate at no higher than 150°C. The zinc acetylacetonate contained in the electron transport layer of the perovskite solar cell of the present invention can make the electron transport layer dense, reduce the formation and distribution of pinholes, and have small internal resistance; the zinc acetylacetonate can also effectively fill the gaps between ZnO nanoparticles . At the same time, zinc acetylacetonate can also play a surface modification role, which can improve the thermal stability of perovskite on the ZnO electron transport layer. The preparation method of the perovskite solar cell of the present invention can effectively ensure the stable quality of the formed film layer containing ZnO and zinc acetylacetonate.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a perovskite solar cell and a preparation method thereof. Background technique [0002] Perovskite solar cells are a new type of solar cells using organic-inorganic halide perovskites as light-absorbing materials. They have the advantages of easy fabrication, low cost, and high efficiency. At present, their highest conversion efficiency has reached more than 22%. The highest efficiency of solar cells such as indium gallium selenide (CIGS), cadmium telluride (CdTe) and polysilicon is equivalent, but much higher than the highest efficiency of dye-sensitized and organic solar cells, and it is a kind of solar cell with broad application prospects. [0003] Perovskite solar cells generally consist of a transparent electrode, an electron transport layer, a perovskite light absorbing layer, a hole transport layer, and a metal back electrode. A significant advantage of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K30/152Y02E10/549
Inventor 柳文军曹培江刘新科韩舜许望颖朱德亮吕有明
Owner SHENZHEN UNIV
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