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A kind of perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of lowering cell performance, limiting application, destroying crystal structure, etc., and achieving the effects of improving electrical conductivity, good photoelectric performance, and promoting diffusion

Active Publication Date: 2018-03-16
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the perovskite material light-absorbing layer of perovskite solar cells is very sensitive to water, and it will chemically react with water in the air with high humidity to destroy the crystal structure, resulting in a decrease in battery performance
Therefore, the preparation and use of perovskite solar cells are controlled under the condition of air relative humidity below 30%, which largely limits its application.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. Add an equal volume of 2mol / L HCl solution dropwise to a 0.46mol / L titanium isopropoxide solution, and stir magnetically at 800rpm for 10h to obtain TiO with a molar concentration of 0.23mol / L 2 Precursor solution;

[0067] 2. According to PbCl 2 :CH 3 NH 3 1:DMF=1.2mmol:3mmol:1mL ratio mixing, magnetic stirring at 800rpm speed at 50°C for 12h, the obtained mass concentration is a perovskite precursor solution of 45wt%;

[0068] 3. According to the ratio of 72.3g Spiro-OMeTAD, 28.8uL 4-tert-butylpyridine (TBP), 17.5uL lithium salt (Li-TFSI), dissolved in 1mL chlorobenzene solvent, mix them magnetically at a rate of 800rpm for 10h to obtain mole A hole transport layer precursor solution with a concentration of 0.17mol / L;

[0069] 4. Use FTO conductive glass with a surface sheet resistance of 7Ω / sq, a light transmittance greater than 85%, and an etching area of ​​1 / 3 of the total area as the substrate and transparent electrode 1, such as figure 1 shown;

[0070] ...

Embodiment 2

[0077] Using the same method as in Example 1, replace step 8 with: under normal pressure, with a flow rate of 3L / min, a relative humidity of 48% air flow at 45°C is stably blown vertically to the sample device after the hole transport layer is deposited 10h (implementation group for Air T45).

[0078] The perovskite solar cell prepared in this embodiment was tested by the same method as in Example 1, and the test results were as follows: image 3 , Figure 4 and shown in Table 1.

Embodiment 3

[0080] Using the same method as in Example 1, replace step 8 with: under normal pressure, with a flow rate of 3 L / min, a relative humidity of 48% of the 65 ° C air stream is stably blown vertically to the sample device after the hole transport layer is deposited 10h (implementation group for Air T65).

[0081] The perovskite solar cell prepared in this embodiment was tested by the same method as in Example 1, and the test results were as follows: image 3 , Figure 4 and shown in Table 1.

[0082] Table 1 Volt-ampere performance parameters of perovskite solar cells

[0083]

[0084] As can be seen from the above examples, the PCE of the perovskite solar cell prepared according to the preparation method provided by the present invention can reach up to 10.42%, the fill factor can reach more than 0.7, and the open circuit voltage V OC and short circuit current J SC Respectively up to 0.95V and 15.24mA / cm 2 .

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Abstract

The invention provides a perovskite solar cell and a preparation method thereof. The invention reduces the contact resistance and improves the electrical conductivity through the moist air treatment of the hole transport layer film, thereby increasing the battery current and improving the photoelectric characteristics of the solar cell; at the same time, the treatment process promotes the oxygen in the hole transport layer and calcium titanium Better diffusion in the mineral layer reduces the trap density, reduces the interface resistance and charge recombination rate between the hole transport layer and the perovskite layer, improves the charge collection and transmission capabilities, and then increases the battery current and voltage, improving the photoelectricity of solar cells characteristics, the perovskite solar cell prepared by the preparation method provided by the invention has a fill factor of more than 0.7, a short-circuit current density of 15.24mA / cm2, an open-circuit voltage of 0.95V, and a photoelectric conversion efficiency of up to 10.42%. photoelectric performance.

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] Solar cells, also known as photovoltaic cells, are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. At present, silicon-based solar cells are mainly used in the market, but their complex manufacturing process, high energy consumption and high cost seriously restrict their large-scale application. [0003] Since 2009, perovskite solar cells have attracted much attention due to their high quantum efficiency, short-circuit current density, and open-circuit voltage. 3 (A=CH 3 NH 3 + , HC(NH 2 ) 2+ etc.; B=Pb 2+ , Sn 2+ etc.; X=Cl - , Br - , SCN - , I - etc.) Photovoltaic materials with a perovskite structure realize photoelectric conversion, and have outstanding advantages such as high efficiency, light weig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/811H10K30/451Y02E10/549
Inventor 李述体张崇臻袁松洋夏超戚明月
Owner SOUTH CHINA NORMAL UNIVERSITY
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