A kind of perovskite type solar cell and preparation method thereof

A solar cell and perovskite type technology, applied in the field of solar cells, can solve the problem of difficult control of perovskite grain nucleation and film growth direction, high probability of electron and hole recombination, and reduction of carrier diffusion length, etc. problems, to achieve the effect of improving photoelectric conversion efficiency and stability, passivating surface defects, and improving film morphology

Active Publication Date: 2021-12-17
CHINA LUCKY FILM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, for planar perovskite solar cells, there are still two problems: (1) The electrode modification layer usually uses electron transport materials (such as TiO 2 , ZnO) or hole transport material (MoO 3 , Spiro-OMeTAD), in this way, the probability of recombination of electrons and holes generated in the perovskite light-absorbing layer is high, which affects the photoelectric performance of the battery; (2) The perovskite light-absorbing layer is directly deposited on the electrode modification by liquid phase method layer surface, due to the perovskite solution CH 3 NH 3 PB 3 In the process of film formation, it self-assembles into nano-scale perovskite micro-grains rapidly. It is difficult to control the nucleation of perovskite grains and the growth direction of the film layer, which reduces the diffusion length of carriers and seriously recombines electrons and holes.

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  • A kind of perovskite type solar cell and preparation method thereof
  • A kind of perovskite type solar cell and preparation method thereof
  • A kind of perovskite type solar cell and preparation method thereof

Examples

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preparation example Construction

[0037] figure 1 In the shown perovskite solar cell, before the perovskite light-absorbing layer is prepared by the liquid phase method, the surface of the electron transport layer is modified to form a liquid crystal layer. The preparation method includes the following steps:

[0038] 1) Clean the transparent electrode, etch the electrode pattern and then clean, dry, and UV / ozone treatment;

[0039] 2) preparing an electron transport layer on the transparent electrode;

[0040] 3) preparing a liquid crystal layer on the surface of the electron transport layer;

[0041] 4) On the surface of the liquid crystal layer, a perovskite light-absorbing layer is grown;

[0042] 5) Depositing a hole transport layer on the surface of the perovskite light-absorbing layer;

[0043] 6) Prepare a counter electrode on the hole transport layer.

[0044] figure 2 In the shown perovskite solar cell, before the perovskite light-absorbing layer is prepared by the liquid phase method, the surf...

Embodiment 1

[0066] The first step is to prepare a transparent electrode:

[0067] The ITO conductive glass was etched with concentrated hydrochloric acid to form an electrode pattern, and then ultrasonically cleaned with detergent, deionized water, absolute ethanol, acetone, and isopropanol for 10 minutes, then dried with nitrogen, and treated with UV / ozone for 20 minutes.

[0068] The second step is to prepare the electron transport layer:

[0069] The precursor solution of nano-ZnO particle colloid was deposited on the surface of the transparent ITO electrode by spin coating, and then placed in a muffle furnace for sintering at a high temperature of 200 ° C for 30 min to form a dense layer with a thickness of 35 nm.

[0070] The third step is to prepare the liquid crystal layer:

[0071] Disperse the liquid crystal molecule 5CB in a chloroform solvent to prepare a transparent and uniform liquid crystal layer solution;

[0072] The solution prepared above is deposited on the surface of...

Embodiment 2

[0082] The first step and the sixth step preparation method are the same as in Example 1.

[0083] The second step is to prepare the electron transport layer:

[0084] Deposition of Nano TiO on the Surface of Transparent ITO Electrode by Spin Coating 2 The precursor solution of the particle colloid is then put into a muffle furnace and sintered at a high temperature of 450° C. for 40 minutes to form a dense layer with a thickness of 5 nm.

[0085]The third step is to prepare the liquid crystal layer:

[0086] Disperse liquid crystal molecule 8CB in chlorobenzene solvent to prepare a transparent and uniform liquid crystal layer solution;

[0087] The solution prepared above was spin-coated on the surface of the electron transport layer to form a thin film layer at a speed of 3500 rpm and a time of 45 s;

[0088] The film layer prepared above was dried at 75° C. for 60 min to form an 8CB liquid crystal layer with a thickness of 0.5 nm.

[0089] The fourth step is to prepare ...

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Abstract

The invention relates to a perovskite solar cell and a preparation method thereof. By arranging a liquid crystal layer on the surface of the electron transport layer or the hole transport layer, the morphology of the film of the electron transport layer or the hole transport layer is improved, and surface defects thereof are passivated , effectively block the transmission of reverse carriers, prevent leakage, reduce the recombination probability of electrons and holes generated in the perovskite light-absorbing layer, and improve the photoelectric conversion efficiency and stability of the battery. At the same time, the liquid crystal layer of the present invention is prepared by a low-temperature solution method, which is suitable for roll-to-roll industrial production of large-area perovskite photovoltaic cells, with simple process and low manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a perovskite solar cell and a preparation method thereof. Background technique [0002] In recent years, with the depletion of energy and the deterioration of the environment, solar cell technology and the market have developed rapidly, especially crystalline silicon solar cells have been widely used around the world, but with the development of emerging industries and special fields of military industry, the demand for solar energy Batteries put forward higher requirements, such as high efficiency, low cost, flexibility, thinness, high specific power, and winding processing. Perovskite solar cells (PSCs) have become a hotspot in research and development and industrialization because they meet all the above requirements. [0003] Perovskite solar cells originated from dye-sensitized solar cells (DSSC, containing liquid electrolyte), and later evolved into the same planar str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/56
CPCH10K71/10H10K30/10Y02E10/549Y02P70/50
Inventor 侯丽新王亚丽王金凤刘贤豪程媛王佳李鹤宋鑫赵伟涛
Owner CHINA LUCKY FILM CORP
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