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Dimer micromolecule electron donor material and preparation method thereof

A technology of electron donor materials and electron acceptor materials, applied in the field of solar cells, can solve the problems of low photoelectric conversion efficiency of solar cells, achieve huge application potential and value, improve photoelectric conversion efficiency, and good solubility

Active Publication Date: 2021-05-25
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a dimer small molecule electron donor material and its preparation method, which is used to solve the problem of the fullerene-based fullerene system in the prior art. Problems such as low photoelectric conversion efficiency of batteries

Method used

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  • Dimer micromolecule electron donor material and preparation method thereof
  • Dimer micromolecule electron donor material and preparation method thereof
  • Dimer micromolecule electron donor material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] figure 1 Shown is a schematic diagram of the synthesis process of the dimer small molecule electron donor material in this example.

[0062] like figure 1 As shown, the preparation process of the dimer small molecule electron donor material is as follows:

[0063] 1. Synthesis of Compound 3

[0064] Compound 1 (0.1000g, 0.0613mmol purchased from Ruixun) and compound 2 (0.0057g, 0.0122mmol purchased from Gia) were dissolved in 10 ml of chloroform, and then DBU (1,8-diazabicycloundec- 7-ene) 0.1 ml. The reaction was stirred at room temperature for 0.5 hours. Then the solvent is removed under reduced pressure, and the silica gel column chromatography is separated, and the eluent is chloroform / petroleum ether (by volume, chloroform: petroleum ether=3: 1), and the product compound 3 is a red solid (0.0450g, and the output is 5% of the theoretical output). 55.48%).

[0065] Characterization data of compound 3: 1 H NMR (600MHz, Chloroform-d) δ9.86(s, 2H), 7.84(s, 2H),...

Embodiment 2

[0071] Adopt embodiment 1 to make dimer small molecule electron donor material (i.e. figure 1 Shown DBTR) prepares a kind of whole small molecule organic solar cell, and concrete preparation process is as follows:

[0072] A kind of all-small-molecule organic solar cell is prepared by using BTR purchased on the market as the electron donor material, and the specific preparation process is as follows:

[0073] The substrate composed of transparent glass and transparent conductive electrode ITO was ultrasonically cleaned with cleaning solution, deionized water, acetone and isopropanol, and dried with nitrogen after cleaning; the substrate was placed in an ozone cleaner for 15 minutes , the hole transport layer material PEDOT:PSS was spin-coated in air (4000rpm, 20s, film thickness 30nm), followed by thermal annealing in air (120°C, 10min), and then the sample was introduced into a glove box filled with nitrogen , the active layer (DBTR: PC 71 BM=1:1, 40mg / ml, active layer fil...

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Abstract

The invention belongs to the technical field of solar cells, and particularly discloses a dimer micromolecule electron donor material and a preparation method thereof. The micromolecule electron donor material contains a molecular structure as shown in a formula (I). The dimer micromolecule electron donor material disclosed by the invention has good solubility, stability, photoelectric property and solution processability, and can be used as an electron donor material of a full-micromolecule organic solar cell. Compared with a monopolymer BTR, the dimer micromolecule electron donor material disclosed by the invention can form a more excellent phase separation morphology with a micromolecule receptor, and particularly, the photoelectric conversion efficiency of a prepared full-micromolecule organic solar cell is obviously improved. The dimer micromolecule electron donor material has huge application potential and value in the fields of organic solar cells and related photovoltaics.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a dimer small molecule electron donor material and a preparation method thereof. Background technique [0002] As a kind of flexible and printable solar cells, organic solar cells are composed of organic semiconductor materials as the core part of solar cells. They have the advantages of wide source of raw materials, good flexibility, solution processing, and printability. In recent years, organic solar cells have become one of the research hotspots in the industry. In the past two years, organic solar cells have developed rapidly. The photoelectric conversion efficiency of all small molecule organic photovoltaic devices using non-fullerenes as acceptor materials has exceeded 14%. Expensive and non-Fullerian organic solar cells are sensitive to film thickness, are not suitable for large-area printing applications, and are not suitable for market promotion. [0003] The smal...

Claims

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Application Information

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IPC IPC(8): C07D519/00H01L51/46H01L51/42
CPCC07D519/00H10K85/655H10K85/656H10K85/6576H10K30/00Y02E10/549
Inventor 胡定琴杨乾广陆仕荣肖泽云
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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