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Metal nanocrystalline-anchoring molecule synergistic passivation perovskite solar cell and preparation method thereof

A metal nanocrystal and solar cell technology, applied in the field of solar cells, can solve the problems of uneven size, cumbersome process and high cost, and achieve the effects of good dispersion, simple process and convenient operation

Inactive Publication Date: 2019-11-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most metal nanocrystals are synthesized by wet chemical methods. This process has some defects: long cycle, cumbersome process, high cost, uneven size, etc., and requires complex processes such as solvent / ligand exchange and repeated purification. Can be incorporated into perovskite thin films
Different types of metal nanocrystals can be prepared by liquid-phase pulsed laser irradiation technology, and the prepared nanocrystals have uniform size and good dispersion, and can be introduced into perovskite films in situ to improve the mobility of carriers. Difficult to improve stability at the same time, such as humidity stability, heat stability, etc.

Method used

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  • Metal nanocrystalline-anchoring molecule synergistic passivation perovskite solar cell and preparation method thereof
  • Metal nanocrystalline-anchoring molecule synergistic passivation perovskite solar cell and preparation method thereof
  • Metal nanocrystalline-anchoring molecule synergistic passivation perovskite solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A gold nanocrystal-anchor molecule synergistic passivation perovskite solar cell, the specific structure is as follows figure 1 As shown, it includes a conductive substrate 1, an electron transport layer 2, a perovskite layer 3, a hole transport layer 4, and a metal electrode 5 stacked sequentially from bottom to top. The perovskite layer is a gold nanocrystal-anchor molecule embedded in perovskite Composite layer formed after the ore grain boundary;

[0045] Gold nanocrystals-anchor molecules are obtained by irradiating the mixture of anchor molecules and gold foil with laser beams; the mixture of anchor molecules and gold foil is obtained by dispersing anchor molecules and gold foil into anti-solvent, and the anchor molecules are 1H, 1H, 2H ,2H-Perfluorodecanethiol.

[0046] The specific preparation method is as follows:

[0047] S1. Under anhydrous and oxygen-free conditions, add gold foil and 10uL of 1H,1H,2H,2H-perfluorodecanethiol to 6mL of ethyl acetate, and mi...

Embodiment 2

[0056] A gold nanocrystal-anchor molecule synergistic passivation perovskite solar cell, comprising a conductive substrate 1, an electron transport layer 2, a perovskite layer 3, a hole transport layer 4 and a metal electrode 5 stacked sequentially from bottom to top, The perovskite layer 3 is a composite layer formed after gold nanocrystals-anchor molecules are embedded in the perovskite grain boundaries;

[0057] Gold nanocrystals-anchor molecules are obtained by irradiating the mixture of anchor molecules and gold foil with laser beams; the mixture of anchor molecules and gold foil is obtained by dispersing anchor molecules and gold foil into anti-solvent, and the anchor molecules are 1H, 1H, 2H ,2H-Perfluorodecanethiol.

[0058] The specific preparation method is as follows:

[0059] Mixed solution preparation method is exactly the same as embodiment 1 in S1;

[0060] Solution preparation method is exactly the same as embodiment 1 in S2;

[0061] The preparation method ...

Embodiment 3

[0068] A gold nanocrystal-anchor molecule synergistic passivation perovskite solar cell, comprising a conductive substrate 1, an electron transport layer 2, a perovskite layer 3, a hole transport layer 4 and a metal electrode 5 stacked sequentially from bottom to top, The perovskite layer 3 is a composite layer formed after gold nanocrystals-anchor molecules are embedded in the perovskite grain boundaries;

[0069] Gold nanocrystals-anchor molecules are obtained by irradiating the mixture of anchor molecules and gold foil with laser beams; the mixture of anchor molecules and gold foil is obtained by dispersing anchor molecules and gold foil into anti-solvent, and the anchor molecules are 1H, 1H, 2H ,2H-Perfluorodecanethiol.

[0070] The specific preparation method is as follows:

[0071] The preparation method of the mixed solution in S1 is exactly the same as in Example 1;

[0072] S2. Under ultrasonic and low-temperature auxiliary conditions, irradiate the mixed solution w...

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Abstract

The invention discloses a metal nanocrystalline-anchoring molecule synergistic passivation perovskite solar cell, which comprises a conductive substrate, an electron transport layer, a perovskite layer, a hole transport layer and a metal electrode which are sequentially stacked from bottom to top, and is characterized in that the perovskite layer is a composite layer formed by embedding metal nanocrystalline-anchoring molecule into a perovskite grain boundary; wherein the metal nanocrystalline-anchoring molecule is obtained by irradiating a mixed solution of an anchoring molecule and a metal material with a laser beam, the mixed solution of the anchoring molecule and the metal material is obtained by dispersing the anchoring molecule and the metal material into an anti-solvent, the anchoring molecule is mercaptan containing a long fluorocarbon chain, and the metal material is gold, platinum or a high-entropy alloy. The invention also provides a preparation method of the cell. Accordingto the perovskite solar cell, metal nanocrystalline-anchoring molecules are introduced into the perovskite layer, perovskite grain boundary defects are passivated, extraction and transmission of photon-generated carriers are improved, and compared with an initial perovskite solar cell, the perovskite solar cell is high in photoelectric conversion efficiency and good in stability.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a metal nanocrystal-anchor molecule cooperative passivation perovskite solar cell and a preparation method thereof. Background technique [0002] Perovskite solar cells face problems such as carrier interface / grain boundary recombination and poor stability, which hinder their practical progress. Therefore, how to further improve the efficiency and stability of perovskite cells has become a key issue that needs to be solved urgently. The introduction of functional and hydrophobic anchoring molecules on the surface and grain boundaries of perovskite can not only passivate defects, improve the photoelectric conversion efficiency of the battery, but also effectively improve the hydrophobicity of the perovskite surface, thereby prolonging the life of the battery. However, most of the anchor molecules used for interface modification have poor electrical conductivity, which is not ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/12H10K30/151H10K30/00H10K30/88Y02E10/549
Inventor 叶谦刘晨郭鹏飞王洪强
Owner NORTHWESTERN POLYTECHNICAL UNIV
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