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Perovskite solar cell doped with multifunctional additive and preparation method of perovskite solar cell

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor water oxygen and light stability, improve efficiency and stability, good repeatability, and improve photoelectric conversion efficiency. and stability effects

Active Publication Date: 2020-08-11
SHAANXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, to provide a perovskite solar cell doped with multifunctional additives and its preparation method; to solve the problem of poor water, oxygen and light stability of the existing perovskite solar cell , the preparation method of perovskite solar cells is simple in experimental operation, high in device efficiency and good in repeatability

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  • Perovskite solar cell doped with multifunctional additive and preparation method of perovskite solar cell
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  • Perovskite solar cell doped with multifunctional additive and preparation method of perovskite solar cell

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preparation example Construction

[0032] The invention discloses a method for preparing a perovskite solar cell doped with a multifunctional additive. The preparation method specifically includes the following processes:

[0033] Step 1, pretreat transparent conductive glass 1; ultrasonically clean the transparent conductive glass in acetone, isopropanol and ethanol for 5 to 30 minutes each, and blow dry with nitrogen to obtain the cleaned substrate. The conductive glass is indium tin oxide (ITO) conductive Glass or fluorine-doped tin oxide (FTO) conductive glass.

[0034] Step 2, preparing an electron transport layer on the cleaned conductive transparent conductive glass;

[0035] The electron transport layer material adopts TiO 2 , ZnO, SnO 2 , Nb 2 o 5 、In 2 o 3 , Zn 2 SnO 4 , PC 60 BM, PC 70 BM and C 60 At least one of them; the electron transport layer is prepared by precipitation, spin coating, scrape coating, screen printing, atomic layer deposition or physical vapor deposition.

[0036] Ste...

Embodiment 1

[0043] Step 1: substrate pretreatment;

[0044] (1) The cut FTO glass was ultrasonically cleaned in acetone, isopropanol and ethanol for 15 minutes each, and dried with nitrogen.

[0045] Step 2: preparing an electron transport layer;

[0046] (1) Deposit a layer of TiO on the etched FTO surface by hydrothermal insulation deposition method 2 as electron transport material;

[0047] Step 3: preparing a perovskite absorbing layer containing 2,2-difluoromalonamide additive;

[0048] (1) According to FA 0.85 MA 0.15 PB 3 The stoichiometric ratio of PbI was weighed 2 , NH 2 CHNH 2 I and CH 3 NH 3 I powder is in reagent bottle, adds 2,2-difluoromalonamide powder, and wherein the mol ratio of 2,2-difluoromalonamide powder and lead iodide is 0.4:1, then adds DMF and DMSO as solvent ( Volume ratio is 4:1), stirred at room temperature for 6h, obtained the perovskite precursor solution containing 2,2-difluoromalonamide additive, wherein PbI 2 The concentration is 1M;

[0049...

Embodiment 1 and comparative example 1

[0064] Table 3 Example 1 and Comparative Example 1 perovskite solar cell air stability comparison

[0065] 0 days 7 days 14 days 25 days 35 days 45 days 60 days Undoped 2,2-difluoromalonamide 20.00 19.22 18.51 17.78 16.34 15.28 13.40 doped with 2,2-difluoromalonamide 21.99 21.52 21.49 21.45 21.07 20.44 20.07

[0066] Figure 6 , Figure 7 The perovskite film containing 2,2-difluoromalonamide additive and the perovskite film not containing 2,2-difluoromalonamide additive in the comparative example are respectively under the air of humidity 25% in embodiment 1 The XRD pattern after placing 40 days. From this figure, it can be seen that the perovskite film without 2,2-difluoromalonamide showed obvious δ phase and PbI 2 Phase diffraction peaks; while the perovskite film containing 2,2-difluoromalonamide appeared after 40 days of δ phase and PbI 2 The diffraction peak intensity of the phase is significantly weaker than that of...

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Abstract

The invention discloses a perovskite solar cell doped with a multifunctional additive and a preparation method of the perovskite solar cell. The perovskite material is a bipolar semiconductor materialwhich has the characteristics of low cost, easiness in film formation, narrow band gap, high absorption coefficient, high carrier mobility and the like; the perovskite absorption layer of the cell comprises 2, 2-difluoromalonamide. The 2, 2-difluoromalonamide contains multiple organic functional groups (-NH2,-C = O,-F) and can interact with components in the perovskite material respectively, so that the quality of the perovskite thin film is effectively improved, defects of the perovskite thin film are passivated, recombination is reduced, decomposition of the thin film is inhibited, and finally the efficiency and stability of the perovskite solar cell are improved.

Description

【Technical field】 [0001] The invention belongs to the technical field of thin-film solar cells, and in particular relates to a perovskite solar cell doped with a multifunctional additive and a preparation method thereof. 【Background technique】 [0002] With the increasing demand for energy and the gradual reduction of fossil energy reserves, finding a new type of renewable energy has become a huge challenge for human society. Solar energy is an important renewable energy source, which has been paid more and more attention by people. An effective way to convert solar energy into electrical energy is to prepare solar cells based on the photovoltaic effect. The development of new solar cells with high efficiency and low cost has become the technical basis for the application of solar photovoltaic power generation. [0003] Perovskite materials have excellent photoelectric properties such as long carrier diffusion distance, wide light absorption range, and low defect state dens...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/15Y02E10/549
Inventor 刘治科蔡园陈名钱芳贺锟展盛刘生忠
Owner SHAANXI NORMAL UNIV
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