Solar cell based on three-dimensional/two-dimensional perovskite and preparation method thereof

A solar cell and perovskite technology, applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve problems such as poor carrier transmission, and achieve the effects of increased open circuit voltage, good compactness, and improved efficiency

Pending Publication Date: 2022-08-09
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor carrier transport of two-dimensional perovskite in the current three-dimensional / two-dimensional perovskite active layer, and propose a three-dimensional / two-dimensional perovskite solar cell and its preparation method

Method used

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  • Solar cell based on three-dimensional/two-dimensional perovskite and preparation method thereof
  • Solar cell based on three-dimensional/two-dimensional perovskite and preparation method thereof
  • Solar cell based on three-dimensional/two-dimensional perovskite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Based on 3D FAPbI 3 / type two-dimensional (EDBE) PbI 4 The carbon electrode perovskite solar cell with the perovskite active layer, the schematic structure of which is shown in Fig. figure 1 As shown, from bottom to top are the transparent conductive substrate 1, the electron transport layer 2, the three-dimensional perovskite active layer 3, the two-dimensional perovskite active layer 4, the hole transport layer 5 and the counter electrode 6. The specific preparation process as follows:

[0043] Step 1. Clean the FTO substrate:

[0044] The FTO substrate was ultrasonically cleaned with glass cleaning agent, deionized water, and alcohol in sequence for 10 minutes, and then blown dry with a nitrogen gun.

[0045] Step 2. Preparation of electron transport layer TiO 2 -SnO 2 :

[0046] Configure TiO 2 Growth solution: 0.5 mL of titanium tetrachloride (TiCl 4 ) solution was dissolved in a blue bottle containing 100 mL of condensed water, and placed in the refrigera...

Embodiment 2

[0063] 3D MAPbI-based 3 / type two-dimensional (EDBE) PbI 4 Carbon-electrode perovskite solar cells with perovskite active layers

[0064] Other steps are the same as in Example 1, except that:

[0065] The 3D perovskite layer is MAPbI 3 , the concentration is 1.21 mol / L (calculated by the content of lead), specifically including the solute methylamido iodide 1 mmol, lead iodide 1 mmol, and the solvent is successively added as DMF 750 μL, DMSO 72 μL, to obtain 822 μL of precursor solution.

[0066] This embodiment is based on three-dimensional MAPbI 3 / type two-dimensional (EDBE) PbI 4 Perovskite thin films, 3D MAPbI 3 Perovskite thin films and type two-dimensional (EDBE) PbI prepared by the same method 4 X-ray diffraction comparison of perovskite films, such as Figure 8 shown. It can be seen from the figure that the three-dimensional MAPbI 3 / type two-dimensional (EDBE) PbI 4 With (EDBE)PbI at 6.14° 4 The peak of the (020) surface of the 2D perovskite proves that...

Embodiment 3

[0069] 3D MAPbI-based 3 / type two-dimensional (EDBE) PbBr 4 The other steps of the carbon electrode perovskite solar cell with the perovskite active layer are the same as those in Example 1, with the following differences:

[0070] The 3D perovskite layer is MAPbI 3 , the concentration is 1.21 mol / L (calculated by the content of lead), specifically including the solute methylamido iodide 1 mmol, lead iodide 1 mmol, and the solvent is successively added as DMF 750 μL, DMSO 72 μL, to obtain 822 μL of precursor solution.

[0071] Nonlinear long-chain organic amine salt solution is EDBEBr 2 / isopropanol solution at a concentration of 0.66 mg / mL.

[0072] This embodiment is based on three-dimensional MAPbI 3 / type two-dimensional (EDBE) PbBr 4 The comparison of J-V curves of carbon electrode solar cells prepared by perovskite is shown in Fig. Figure 10 It can be seen that the photoelectric conversion efficiency is 16.13%, the open circuit voltage, short circuit current den...

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Abstract

The invention relates to a three-dimensional/two-dimensional perovskite-based solar cell and a preparation method thereof. The solar cell sequentially comprises a transparent conductive substrate, an electron transport layer, a three-dimensional perovskite active layer, a two-dimensional perovskite active layer, a hole transport layer and a counter electrode from bottom to top, in the two-dimensional perovskite active layer, the structure of the two-dimensional perovskite is lt; 110gt, 110gt; and shaping. According to the preparation method, a high-quality three-dimensional perovskite thin film is prepared by adopting low-pressure auxiliary treatment, and then a nonlinear long-chain organic amine salt solution is used for treatment, so that the thin film with the 1t is generated on the upper surface of the three-dimensional perovskite in situ; 110gt, 110gt; the invention discloses a two-dimensional perovskite layer. The preparation method is efficient, the preparation process is simple, and the obtained three-dimensional/lt is achieved; 110gt, 110gt; the two-dimensional perovskite thin film is better in film-forming property and fewer in defect, the carrier transport performance of the perovskite solar cell prepared on the basis of the two-dimensional perovskite thin film is improved, and the photoelectric conversion efficiency is remarkably improved.

Description

technical field [0001] The invention belongs to the field of semiconductor optoelectronic materials and devices, in particular to a three-dimensional / <110> type two-dimensional perovskite solar cell and a preparation method thereof. Background technique [0002] Organic-inorganic hybrid perovskite materials have attracted extensive research due to their excellent photophysical properties and are developing rapidly. The photoelectric conversion efficiency of perovskite solar cells has increased from 3.8% in 2009 to 25.7% in 2022. , close to the efficiency of monocrystalline silicon cells, showing great application prospects. At present, high-efficiency perovskite solar cells often use three-dimensional perovskite as the active layer. However, the environmental stability of three-dimensional perovskite is poor, which seriously affects its commercialization. Compared with 3D perovskite, 2D perovskite has excellent humidity stability and thermal stability. Therefore, con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/40H10K85/60H10K30/10Y02P70/50
Inventor 吴存存张贤郑士建
Owner HEBEI UNIV OF TECH
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