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High-stability perovskite solar cell based on sulfate doping

A solar cell, perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of inability to protect perovskite films from moisture and oxygen erosion, weak secondary bonds, etc. Effects of current and photoelectric conversion efficiency, improved transfer rate, film quality, and improved humidity stability

Pending Publication Date: 2021-04-20
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the secondary bonds between these passivating molecules and the perovskite surface are usually too weak to protect the perovskite film from moisture and oxygen.

Method used

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  • High-stability perovskite solar cell based on sulfate doping
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  • High-stability perovskite solar cell based on sulfate doping

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Sulfate-free perovskite solar cell devices

[0051] figure 2 It is the physical cross-sectional view of the device obtained by SEM scanning electron microscope, and its preparation process is as follows:

[0052] Step (1) Select the FTO conductive glass with a square resistance of 5-25Ω, a transmittance of 70-95%, and a size of 2cm*2cm as the substrate, then clean it with detergent, distilled water, ethanol and acetone, and finally use ultraviolet light to clean it. -Ozone machine for treatment.

[0053] Step (2) preparation of electron transport layer

[0054] SnO with a mass percent concentration of 15% 2 The colloidal aqueous solution and deionized water were mixed at a volume ratio of 1:6 to prepare SnO 2 Precursor solution, drop 80 μl of precursor solution on the FTO conductive glass per square centimeter through a pipette gun, and spin-coat at 5000rpm for 30s to deposit 30nm thick SnO 2 dense layer, and annealed at 100°C and 150°C for 10 minutes and 25 minut...

Embodiment 2

[0062] A perovskite solar cell device based on sulfate doping

[0063] Except for step (3), all steps and methods are identical to the foregoing Example 1.

[0064] Step (3) Preparation of sulfate-doped perovskite light-absorbing layer by solution method

[0065] Dissolve 60mg of methylamine sulfate in 1ml of DMSO solution to prepare sulfate precursor solution; 1mmol of FAI, 0.9-1.2mmol of PbI 2 , 0.2mmol of MABr, 0.075mmol of CsI, 0.2mmol of PbBr 2 Prepare the perovskite precursor solution by dissolving 1ml of DMF and DMSO mixed solvent with a volume ratio of 4:1; add 50 μl of the sulfate precursor solution to 1 mL of the above perovskite precursor solution; stir and dissolve at room temperature, 3.8 wt% methylamine sulfate-doped Cs were obtained 0.05 (FA 0.85 MA 0.15 ) 0.95 Pb(I 0.85 Br 0.15 ) 3 Perovskite Precursor. SnO per square centimeter by pipetting 2 60 μl of perovskite precursor solution was added dropwise on the dense layer, the spin coating speed was 400...

Embodiment 3

[0067] A perovskite solar cell device based on sulfate doping

[0068] Except for step (3), all steps and methods are identical to the foregoing Example 1.

[0069] Step (3) Sulfate-doped perovskite light-absorbing layer prepared by vacuum flash evaporation

[0070] Dissolve 120mg of methylamine sulfate in 1ml of DMSO solution to prepare sulfate precursor solution; 1mmol of FAI, 0.9-1.2mmol of PbI 2 , 0.2mmol of MABr, 0.075mmol of CsI, 0.2mmol of PbBr 2 Dissolved in 1ml of DMF and NMP mixed solvent with a volume ratio of 8:1 to prepare a perovskite precursor solution; take 50 μl of sulfate precursor solution and add it to the above perovskite precursor solution; stir and dissolve at room temperature to obtain 7.5 wt% methamine sulfate doped Cs 0.05 (FA 0.85 MA 0.15 ) 0.95 Pb(I 0.85 Br 0.15 ) 3 Precursor. Spin-coat 60 μl of the above perovskite precursor solution on each square centimeter of SnO 2 On the dense layer, the rotation speed is 6000rmp, and the time is 10s...

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Abstract

The invention relates to a high-stability perovskite solar cell based on sulfate doping. The solar cell is composed of FTO conductive glass, an electron transport layer, a perovskite light absorption layer, a hole transport layer and a metal electrode from bottom to top. The light absorption layer is a methylamine sulfate doped perovskite light absorption layer; a thickness is 150-1000 nm; and the doping amount of sulfate in the perovskite light absorption layer is 0.01-30wt%. According to the invention, through an in-situ reaction with selected inorganic anions, a compact inorganic lead-containing oxysalt layer can be formed on the surface of the perovskite thin film, the oxygen-containing lead salt layer on the surface and perovskite can form a firm chemical bond, and excellent stability can be achieved under an atmosphere and illumination. Meanwhile, the perovskite solar cell based on sulfate doping shows excellent photoelectric conversion performance.

Description

technical field [0001] The invention belongs to the field of new material solar cells, and more specifically relates to a highly stable perovskite solar cell based on sulfate doping and a preparation method thereof. Background technique [0002] With the development of society and the advancement of science and technology, the global power consumption has increased sharply, and the environmental pollution caused by the combustion of fossil fuels has become increasingly serious. As a clean and renewable basic energy source, the preparation and application of solar cells based on the photovoltaic effect is an effective way to solve the energy crisis and global warming. [0003] As the first generation of solar photovoltaic technology, silicon-based solar cells are one of the most mature and widely used technologies. However, silicon-based solar cells not only have strict requirements on the purity of raw materials, but also have poor device performance under high temperature a...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/42H01L51/44H01L51/48
CPCY02E10/549
Inventor 陈聪马晓辉杨立群朱立华商雪妮吴存存郑士建
Owner HEBEI UNIV OF TECH
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