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A kind of dimer small molecule electron donor material and its preparation method

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: 2021-12-10
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI +1
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  • 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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  • A kind of dimer small molecule electron donor material and its preparation method
  • A kind of dimer small molecule electron donor material and its preparation method
  • A kind of dimer small molecule electron donor material and its preparation method

Examples

Experimental program
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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] Such as 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, separated by silica gel column chromatography, the eluent is chloroform / petroleum ether (by volume, chloroform:petroleum ether=3:1), the product compound 3 is a red solid (0.0450g, the yield is 1% of the theoretical yield) 55.48%).

[0065] Characterization data of compound 3: 1 H NMR (600MHz, Chloroform-d) δ9.86(s,2H),7.84(s,2H),7.67(d,J=4.0Hz,2H),7.61(s...

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 , Spin-coat the hole transport layer material PEDOT:PSS in air (4000rpm, 20s, film thickness 30nm), then perform thermal annealing in air (120°C, 10min), and then transfer the sample into a glove box filled with nitrogen , the active layer (DBTR:PC 71 BM=1:1, 40mg / ml, active layer film thickness:...

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Abstract

The invention belongs to the technical field of solar cells, and specifically discloses a dimer small molecule electron donor material and a preparation method thereof. The small molecule electron donor material contains a molecular structure as shown in formula (I). The dimer small molecule electron donor material of the present invention has good solubility, stability, photoelectricity and solution processability, and can be used as an electron donor material for all small molecule organic solar cells; BTR, the dimer small-molecule electron donor material of the present invention can form a more excellent phase-separated morphology with the small-molecule acceptor, especially the photoelectric conversion efficiency of the prepared all-small-molecule organic solar cell is significantly improved. The invention has great application potential and value in organic solar cells and related photovoltaic fields.

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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Patent Type & Authority Patents(China)
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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