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Catechol-anchored molecule-passivated perovskite solar cells containing long fluorocarbon chains and preparation method thereof

A technology for solar cells and catechol, which is applied in semiconductor/solid-state device manufacturing, circuits, electrical components, etc., can solve the problems of less functional regulation and low molecular synthesis yield, and achieves convenient operation, improved crystallinity, and improved The effect of work ability

Active Publication Date: 2021-09-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many research works combine interface engineering / defect passivation / crystallinity improvement through molecular design and synthesis to achieve multi-dimensional regulation of perovskite solar cell device performance; however, limited by the difficulty of molecular design and synthesis, the more complex the structure The lower the yield of complex molecular synthesis, the less functional regulation can be achieved by obtaining easier industrial products. This is a long-standing problem in this field that needs to be broken through

Method used

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  • Catechol-anchored molecule-passivated perovskite solar cells containing long fluorocarbon chains and preparation method thereof
  • Catechol-anchored molecule-passivated perovskite solar cells containing long fluorocarbon chains and preparation method thereof
  • Catechol-anchored molecule-passivated perovskite solar cells containing long fluorocarbon chains and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0033] A long fluorocarbon chain anchoring molecular passivation perovskite solar cell containing ortho-phenolic hydroxyl groups, the specific structure is as follows figure 1 As shown, it includes a conductive glass substrate 1, an electron transport layer 2, a perovskite layer 3, an anchor molecular layer 4, a hole transport layer 5, and a metal electrode 6. The perovskite layer is a long fluorocarbon chain anchor molecule containing an ortho phenolic hydroxyl group A composite layer formed after embedding in perovskite grain boundaries and surfaces;

[0034] The long fluorocarbon chain anchoring molecules containing ortho-phenolic hydroxyl groups are synthesized by one-step amidation of dopamine and perfluorohexylacetic acid; the anti-solvent solution of the anchoring molecules is obtained by dispersing the prepared anchoring molecules into the anti-solvent, and the anti-solvent is chlorine benzene.

[0035] The specific preparation method is as follows:

[0036] S1. Diss...

Embodiment 2

[0046] A passivated perovskite film containing long fluorocarbon chain anchoring molecules containing ortho-phenolic hydroxyl groups. The film is a composite layer formed by embedding long-fluorocarbon chain anchoring molecules containing ortho-phenolic hydroxyl groups on the grain boundaries and surfaces of perovskite ;

[0047] The long fluorocarbon chain anchoring molecules containing ortho-phenolic hydroxyl groups are synthesized by one-step amidation of dopamine and perfluorohexylacetic acid; the anti-solvent solution of the anchoring molecules is obtained by dispersing the prepared anchoring molecules into the anti-solvent, and the anti-solvent is chlorine benzene.

[0048] The specific preparation method is as follows:

[0049] The preparation method of the anchor molecule in S1 is exactly the same as that in Example 1;

[0050] In S2, the separation and removal of impurities to product is exactly the same as in Example 1;

[0051] S3. Weigh 3 mg of anchoring molecul...

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Abstract

The invention discloses a catechol anchoring molecule passivation perovskite solar cell containing a long fluorocarbon chain and a preparation method thereof, and uses an amidation reaction to synthesize an anchoring molecule containing a catechol passivating group and a long fluorocarbon chain Spin-coat the perovskite precursor on the conductive glass substrate to form a mesophase film, introduce the anti-solvent solution of anchor molecules into the mesophase film to form a perovskite film modified by anchor molecules, prepare the hole transport layer, evaporate Plating metal electrodes to obtain perovskite solar cells. The present invention synthesizes anchoring molecules through a one-step amidation reaction, introduces anchoring molecules containing functional groups and long fluorocarbon chains on the grain boundaries and surfaces of the perovskite layer, passivates the defects of the perovskite bulk phase, and reduces the photogenerated loading. The non-radiative recombination of flow electrons and the promotion of their extraction and transport at the interface enhance the ability of the device to resist water and oxygen. Compared with unmodified perovskite solar cells, the power conversion efficiency is improved and the humidity stability is greatly improved.

Description

technical field [0001] The invention relates to the technical field of perovskite-based photoelectric devices, in particular to a catechol anchoring molecule passivation perovskite solar cell containing long fluorocarbon chains and a preparation method thereof. Background technique [0002] Realizing perovskite solar cells with high performance, high service stability and low repeated production cost has been the consistent pursuit of researchers. However, organic-inorganic hybrid perovskite materials are faced with poor humidity stability and carrier interface / Problems such as grain boundary recombination cannot be fundamentally resolved, which restricts the further improvement of the efficiency of perovskite cells and hinders their practical application. Most optimizations for perovskite solar cell devices focus on the following aspects: 1) improving crystallinity (to reduce defects); 2) achieving defect passivation (to suppress carrier recombination); 3) implementing int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/30H10K30/00Y02E10/549
Inventor 叶谦杨赫龙美娟郭鹏飞王洪强
Owner NORTHWESTERN POLYTECHNICAL UNIV