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Perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems that limit the development of perovskite solar cells, achieve the effects of suppressing the recombination of dark current, increasing current and opening voltage, filling factor, and improving surface morphology Effect

Inactive Publication Date: 2017-05-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has greatly limited the development of perovskite solar cells, both in terms of cost and environmental protection.

Method used

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

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Effect test

Embodiment 1

[0032] The perovskite layer is prepared using a new perovskite material 3MAI: PbAc 2 ·xH 2 O preparation, based on lead acetate (PbAc 2 ·xH 2 O) and methylamine iodine (MAI) dissolved in N,N-dimethylformamide (DMF) at a molar ratio of 1:3 to prepare a perovskite precursor solution with a mass fraction of 30%-50%, preferably x=2.8 H 2 O, the preferred mass fraction is 46%, and the perovskite layer is prepared at low temperature (<100ºC) by rapid preheating of the substrate and heating of the perovskite precursor solution, i.e. heat-assisted spin coating. Metal Au is used as the metal electrode layer, and its specific preparation steps are as follows.

[0033] (1) On the cleaned UV-treated transparent FTO conductive glass substrate, a dense hole transport layer was obtained by spin-coating PEDOT:PSS aqueous solution, and heat-treated at 140 ºC for 20 minutes to form a hole transport layer with a thickness of 50nm about.

[0034] (2) A 0.03 mg / ml 1-ethyl-3-methylimidazolium ...

Embodiment 2

[0041] The perovskite layer is prepared using a new perovskite material 3MAI: PbAc 2 ·xH 2 O preparation, based on lead acetate (PbAc 2 ·xH 2 O) and methylamine iodine (MAI) dissolved in N,N-dimethylformamide (DMF) at a molar ratio of 1:3 to prepare a perovskite precursor solution with a mass fraction of 30%-50%, preferably x=2.8 H 2 O, the preferred mass fraction is 46%, and the perovskite layer is prepared at low temperature (<100ºC) by rapid preheating of the substrate and heating of the perovskite precursor solution, i.e. heat-assisted spin coating. Metal Au is used as the metal electrode layer, and its specific preparation steps are as follows.

[0042] (1) On the cleaned UV-treated transparent FTO conductive glass substrate, a dense hole transport layer was obtained by spin-coating PEDOT:PSS aqueous solution, and heat-treated at 140 ºC for 20 minutes to form a hole transport layer with a thickness of 50nm about.

[0043] (2) A 0.03 mg / ml 1-ethyl-3-methylimidazolium ...

Embodiment 3

[0050] The perovskite layer is prepared using a new perovskite material 3MAI: PbAc 2 ·xH 2 O preparation, based on lead acetate (PbAc 2 ·xH 2 O) and methylamine iodine (MAI) dissolved in N,N-dimethylformamide (DMF) at a molar ratio of 1:3 to prepare a perovskite precursor solution with a mass fraction of 30%-50%, preferably x=2.8 H 2 O, the preferred mass fraction is 46%, and the perovskite layer is prepared at low temperature (<100ºC) by rapid preheating of the substrate and heating of the perovskite precursor solution, i.e. heat-assisted spin coating. Metal Au is used as the metal electrode layer, and its specific preparation steps are as follows.

[0051] (1) On the cleaned UV-treated transparent FTO conductive glass substrate, a dense hole transport layer was obtained by spin-coating PEDOT:PSS aqueous solution, and heat-treated at 140 ºC for 20 minutes to form a hole transport layer with a thickness of 50nm about.

[0052] (2) A 0.03 mg / ml 1-ethyl-3-methylimidazolium ...

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Abstract

The invention discloses a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a transparent conductive substrate, a hole transport layer, a decoration layer, a perovskite layer, an electron transport layer, a barrier layer and a metal electrode. The surfaces of PEDOT: PSS, NiOx and the hole transport layer are decorated by ionic liquid based on imidazole, atomic force microscope graphs before and after the decoration are compared, and the decorated surface appearance is more smooth, which is conducive to inhibiting the compounding of dark current. The perovskite layer is a new perovskite material 3MAI: PbAc2.xH2O (x is not smaller than 0 and is not greater than 3), and is prepared by quickly preheating a substrate and heating a perovskite precursor solution, namely instant heating assisted spray coating technology (HASP) at a low temperature (lower than 100 DEG C), which is conducive to increasing the grain size of perovskite and reducing the defects between perovskite grains so as to greatly improve the efficiency of the perovskite battery. The photoelectric conversion efficiency of the final battery device is greater than 19%, the flexible device efficiency is 10.8%, no hysteresis effect is formed, and thus the preparation method has a broad application prospect.

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. [0002] technical background [0003] So far, the photoelectric conversion efficiency of perovskite solar cells that has been reported has reached 22.1%. As the third generation of solar cells, perovskite solar cells have attracted more and more attention because of their high photoelectric conversion efficiency, low cost and easy preparation. However, most of the current high-efficiency perovskite solar cells are based on TiO 2 As a positive structure battery for the electron transport layer, this material needs to be sintered at a high temperature above 400 ºC, and the battery device will produce obvious hysteresis effects, which greatly limits the application prospects of flexible perovskite solar cells, and in When preparing perovskite thin films, harmful solvents such as chlorobenzene and toluene, which are toxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K85/00H10K30/00H10K30/80Y02E10/549
Inventor 潘春跃周贤勇徐保民
Owner CENT SOUTH UNIV
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