Small molecule organic solar cell material based on a boron nitrogen heterocycle and its preparation method

A solar cell and small molecule technology, applied in organic chemistry, chemical instruments and methods, circuits, etc., can solve problems such as differences in the properties of organic molecules, and achieve the effects of good planar performance, easy operation and control, and improved conversion efficiency.

Active Publication Date: 2021-02-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to significant differences in the properties of organic molecules

Method used

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  • Small molecule organic solar cell material based on a boron nitrogen heterocycle and its preparation method
  • Small molecule organic solar cell material based on a boron nitrogen heterocycle and its preparation method
  • Small molecule organic solar cell material based on a boron nitrogen heterocycle and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Synthesis of Acceptor Materials Containing Boron Heterocycle BN-Ph

[0034] The synthesis steps are shown in the figure below. The previous synthesis work of this kind of small molecule acceptor material is the same. The borane substitution introduces different substituted phenyl groups, the bridging unit introduces different π units, and the Knoevenagel condensation reaction introduces different Electron-withdrawing groups, thereby producing small molecule acceptor materials with different band gaps and energy levels. Therefore, in the specific implementation case, Ar is the benzene ring, and the electron-withdrawing group A is 3-(dicyanomethylene) indigo-1 - Example of the synthesis of small molecule acceptor materials for ketones.

[0035]

[0036] The first step, by 2,5-dibromo-p-phenylenediamine as the raw material synthetic dibromoaniline substituted, as shown in the figure, the specific steps are: 2,5-dibromo-p-phenylenediamine (5g) is added to the In water t...

Embodiment 2

[0048] Taking the material obtained in Example 1 as an example to illustrate the application of such boron-nitrogen materials as small molecule acceptors in organic solar cell devices

[0049] The following example will illustrate the boron-nitrogen-containing heterocyclic small molecule organic solar material proposed in the present invention and its application process in organic photoelectric devices, but the present invention is not limited to the examples given.

[0050] The specific preparation process of the device is as follows:

[0051] Spin-coat a 40nm PEDOT:PSS hole transport layer on ITO, then spin-coat a PTB7-Th and BN-Ph SM blend photoactive layer of about 100nm, and then spin-coat an amino-based polyfluorene of about 5nm The quaternary ammonium bromide salt (PFN-Br) was used as the cathode interface layer, and then a 100 nanometer Ag layer was evaporated to complete the preparation of the device. The J-V curve test is carried out, and the relevant parameters of...

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Abstract

A small-molecule organic solar cell material based on a boron-nitrogen heterocycle and its preparation method. The synthesis route is: (1) synthesizing a central structure containing a boron-nitrogen unit; (2) introducing a bridging unit through a Stille coupling reaction; ( 3) Electron-withdrawing groups are introduced through Knoevenagel condensation reaction; the general formula of its molecular structure is M, where Ar is an aromatic ring substituent, A is an electron-withdrawing group, and π is a bridging unit. This type of material (as shown in Figure M) has good planarity and belongs to the rare broadband donor structure. It has great application prospects in the field of solar cells, especially the active layer.

Description

technical field [0001] The invention relates to a class of boron-nitrogen bond-containing organic semiconductor materials and a preparation method thereof. The series of materials belong to the technical field of photoelectric materials and applications, in particular small molecule materials for organic solar cells. Background technique [0002] Due to the advantages of light weight, flexibility and large-area processing, organic solar cells have attracted worldwide attention, and active layer materials have attracted the attention and research of a large number of scientists. In contrast, polymeric materials have the disadvantages of being batch-affected, insoluble, and difficult to purify. Small molecule materials have the advantages of tunable energy levels, simple synthesis, low processing cost, excellent solubility, and broad spectrum absorption, so they have received more and more attention. [0003] Boron is the element with the smallest atomic radius in the third m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/02H01L51/42H01L51/46
CPCC07F5/02H10K85/655H10K85/657H10K30/00Y02E10/549
Inventor 段春晖庞淑婷黄飞曹镛
Owner SOUTH CHINA UNIV OF TECH
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