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Ionic perylene diimide electron transport material and synthesis method and use thereof

An electron transport material, perylene diimide technology, applied in circuits, electrical components, electrical solid devices, etc., to achieve the effects of easy deployment, improved energy conversion efficiency, and low cost

Inactive Publication Date: 2018-10-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, ionic perylene diimide-based electron transport materials for perovskite solar cells have not been reported

Method used

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  • Ionic perylene diimide electron transport material and synthesis method and use thereof
  • Ionic perylene diimide electron transport material and synthesis method and use thereof
  • Ionic perylene diimide electron transport material and synthesis method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: FA 2+ - Synthesis of PDI2:

[0038]

[0039] (1) 2,7-dibromo-9,9-bis[3'-(N,N-dimethylamino)propyl]-fluorene (1.5g, 3.0mmol), pinacol borate (1.9 g, 7.5mmol), [1,1-bis(diphenylphosphino)ferrocene]palladium dichloride (0.5g, 0.6mmol), potassium acetate (3.5g, 35.9mmol) were added to the reaction flask and dissolved in Tetrahydrofuran (100 mL) solution was stirred evenly under nitrogen protection, heated to 80° C., and reacted for 24 h. After the reaction was completed, it was cooled to room temperature, 100 mL of water was added to the reaction solution, extracted three times with 150 mL of ethyl acetate, the organic layer was collected, and the solvent was removed under reduced pressure. The residue was subjected to silica gel column chromatography, methanol / dichloromethane (1:20) was used as the eluent, separated and purified, and after vacuum drying, the target product 2,7-bis(4,4,5,5-tetra Methyl-1,3,2-dioxaborolan-2-yl)-9,9-bis[3'-(N,N-dimethylamino)...

Embodiment 2

[0042] Embodiment 2: the synthetic compound FA of embodiment 1 2+ - Electron mobility and conductivity test of PDI2

[0043] Compound FA synthesized in embodiment 1 2+ -The electron mobility of PDI2 is tested by the space current limitation method (SCLC). The battery device structure used in the test is: F-doped tin oxide conductive glass / titanium dioxide / electron transport material / titanium dioxide / silver. For pure electronic devices , the space current limitation method test can be described as

[0044]

[0045] Among them, ε the dielectric constant of the electron transport material; ε 0 is the dielectric constant of vacuum; μ 0 is the zero-field mobility; J is the current density; L is the film thickness.

[0046] Compound FA synthesized in embodiment 1 2+ -The conductivity of PDI2 is tested using a two-probe conductivity test method, and the conductivity is determined by the following equation

[0047] s=L / Rwd

[0048] Among them, L is the channel length (10mm);...

Embodiment 3

[0049] Embodiment 3: With the synthetic compound FA of embodiment 1 2+ -Assembly of trans perovskite solar cells with PDI2 as electron transport material

[0050] FTO (fluorine doped tin dioxide) conductive glass was cut into 25mm x 15mm glass substrates. , and etch using zinc powder and hydrochloric acid chemistry. The etched glass substrate was cleaned in deionized water, acetone and ethanol for 15 minutes respectively. Using the spray pyrolysis method, the mixed solution of 0.02M nickel acetylacetonate in acetonitrile and ethanol (volume ratio of 95:5) was heated to 450°C and sprayed onto the glass substrate to form a very thin dense layer of nickel oxide, and then It was heated to 450°C and sintered for 30 minutes. The following operating steps (except the vacuum evaporation step) were all completed in a nitrogen-filled glove box. We will lead iodide (PbI 2 ), lead chloride (PbCl 2 ), methylammonium iodide (MAI) (molar ratio 0.93:0.17:1) was dissolved in N,N-dimethyl...

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Abstract

The invention belongs to the technical field of electron transport materials, and discloses an ionic perylene diimide electron transport material and a synthesis method thereof and use thereof. The material is a non-fullerene ion type electron transport material, has excellent electrical conductivity and film forming properties, and is successfully applied to a trans-perovskite solar cell. The device structure of the trans-perovskite solar cell is glass / fluorine-doped tin oxide layer / dense nickel oxide layer / perovskite absorber layer / electron transport layer / titanium oxide layer (TiOx) / silverelectrode. The trans-perovskite solar cell based on the non-fullerene ion type electron transport material prepared by the synthesis method has the advantages of high efficiency, high stability and low cost compared with a conventional fullerene type electron transport material. A new non-fullerene ion-type electron transport material with broad application prospects is created, and provides a newchoice for the preparation of highly efficient and stable trans-perovskite solar cells in terms of electron transport materials.

Description

technical field [0001] The invention belongs to the technical field of electron transport materials, and relates to an ion-type perylene diimide electron transport material used for trans-planar perovskite solar cells. Background technique [0002] As an emerging solar cell technology, perovskite solar cells (Perovskit Solar Cells, PSCs) are developing rapidly, and its photoelectric conversion efficiency has exceeded 22% in just a few years, because its cell performance has reached that of silicon solar cells. A considerable level, and the preparation process is simple, low cost, and has good application prospects, making perovskite solar cells quickly become a global research hotspot. The structure of perovskite solar cells mainly includes electrodes, electron transport layer (electron transport layer, ETL), perovskite absorber layer and hole transport layer (hole transport layer, HTL). According to the relative position of ETL, HTL and perovskite active layer, the cell st...

Claims

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Application Information

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IPC IPC(8): C07D471/06C07D519/00H01L51/46
CPCC07D471/06C07D519/00H10K85/621H10K85/6572Y02E10/549
Inventor 程明陈承李华明
Owner JIANGSU UNIV
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