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Perovskite solar cell based on copper-indium-sulfur nanocrystals and preparation method thereof

A technology of solar cells and nanocrystals, applied in the field of solar cells, can solve the problems of high price, high cost of solar cells, and complicated synthesis process, and achieve the effects of short reaction time, high photoelectric conversion efficiency, and good stability

Inactive Publication Date: 2019-01-29
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to improve the hole mobility of these materials, some lithium salts (such as: Li-TFSI) need to be added for doping, but the addition of lithium salts will decompose the perovskite, resulting in poor battery stability.
In addition, the synthesis process of these organic materials is complicated and requires high purity, so the price is very expensive, resulting in higher cost of solar cells

Method used

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  • Perovskite solar cell based on copper-indium-sulfur nanocrystals and preparation method thereof
  • Perovskite solar cell based on copper-indium-sulfur nanocrystals and preparation method thereof
  • Perovskite solar cell based on copper-indium-sulfur nanocrystals and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a CuInS 2 A method for preparing nanocrystals, comprising the steps of:

[0039] 1) Add 1 mmol of sublimed sulfur powder into 1 ml of diphenylphosphine (DPP) solution and dissolve it by ultrasonic to form a transparent light yellow DPP-S precursor solution.

[0040] 2) Mix 0.3 mmol cuprous iodide (CuI), 0.3 mmol indium acetate (In(OAC) 3 ), 6.0 ml oleylamine and 6.0 ml octadecene (ODE) were mixed to obtain A solution, which was filled into a three-necked flask with nitrogen gas, stirred and dissolved, and the solution was slowly heated to 90 ° C, and kept at this temperature for 10 min. Then, it was heated to 180°C.

[0041] 3) At 180°C, inject the DDP-S precursor solution obtained in step 1) into the solution A in the three-necked flask. min. Then start to lower the temperature (natural cooling is enough here, no speed requirement), when the temperature of the solution drops to 90°C, inject 10 ml of n-hexane into the mixed solution, and lower the mixed solution to r...

Embodiment 2

[0048] The difference from Example 1 is:

[0049] 1) In step 1), 0.5 mmol of sublimated sulfur powder and 0.5 ml of diphenylphosphine (DPP) are used.

[0050] 2) In step 2), copper iodide (CuI) is 0.1 mmol, indium acetate (In(OAC) 3 ) is 0.1 mmol, oleylamine is 4.0 ml, and octadecene (ODE) is 4.0 ml.

Embodiment 3

[0052] The difference from Example 1 is:

[0053] 1) In step 1), 1.5 mmol of sublimated sulfur powder and 1.5 ml of diphenylphosphine (DPP) were used.

[0054] 2) In step 2), copper iodide (CuI) is 0.5 mmol, indium acetate (In(OAC) 3 ) is 0.5mmol, oleylamine is 8.0ml, and octadecene (ODE) is 8.0ml.

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Abstract

The invention relates to a perovskite solar cell based on copper-indium-sulfur nanocrystals and a preparation method thereof. The preparation method comprises the steps of dissolving sublimated sulfurpowder in DDP, and mixing evenly to form a DDP-S precursor solution; (2) mixing cuprous iodide, indium acetate, oleylamine, and octadecene to obtain a solution A, and heating the solution A; (3) mixing the DDP-S precursor solution in the step 1) and the solution A, then cooling, and injecting normal hexane to obtain a mixed solution B; (4) washing and drying to obtain a CuInS2 nanocrystal material. The CuInS2 nanocrystal material is enabled to serve as a hole transport layer to prepare a perovskite cell, and the prepared cell is good in stability and high in photoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a copper indium sulfur nanocrystal perovskite solar cell and a preparation method thereof. Background technique [0002] In the field of solar cells, perovskite solar cells have attracted widespread attention due to their high absorption coefficient, long carrier diffusion length, high conversion efficiency, and simple preparation methods. Perovskite solar cells are generally composed of three parts: electron transport materials, perovskite materials and hole transport materials. Hole transport materials are generally organic polymer materials, such as: spiro-OMeTAD, P3HT and so on. The perovskite solar cells with high conversion efficiency reported so far are all obtained by using these organic materials. However, in order to improve the hole mobility of these materials, some lithium salts (such as: Li-TFSI) need to be added for doping. However, the addition of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y30/00
CPCB82Y30/00H10K71/12H10K30/00H10K2102/00Y02E10/549
Inventor 毛艳丽张振龙刘燕
Owner HENAN UNIVERSITY
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