A locally asymmetric small-molecule acceptor material with terminal groups and its application in all-small-molecule organic solar cells

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

Active Publication Date: 2021-12-21
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 above-mentioned prior art, the purpose of the present invention is to provide a kind of end group local asymmetric small molecule acceptor material and its application on the whole small molecule organic solar cell, using the end group local asymmetry strategy to solve Low photoelectric conversion efficiency of all small molecule organic solar cells

Method used

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  • A locally asymmetric small-molecule acceptor material with terminal groups and its application in all-small-molecule organic solar cells
  • A locally asymmetric small-molecule acceptor material with terminal groups and its application in all-small-molecule organic solar cells
  • A locally asymmetric small-molecule acceptor material with terminal groups and its application in all-small-molecule organic solar cells

Examples

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Effect test

Embodiment 1

[0050] A forward organic solar cell device was prepared using BTP-FCl-FCl as a small molecule acceptor material. The molecular structure of BTP-FCl-FCl is as follows:

[0051]

[0052] The specific preparation method is as follows:

[0053]The substrate composed of transparent glass and transparent conductive electrode ITO was ultrasonically cleaned with cleaning solutions deionized water, acetone and isopropanol, and dried with nitrogen after cleaning; after 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, On the PEDOT:PSS hole transport layer, the active layer was prepared by spin coating (BTR-Cl:BTP-FCl-FCl=2:1, 17mg / ml, active layer film thickness: ≈110nm), and the obtained active layer The film was subjected to solvent annealing ...

Embodiment 2

[0055] A forward organic solar cell device was prepared using BTP-FBr-FBr as a small molecule acceptor material. The molecular structure of BTP-FBr-FBr is as follows:

[0056]

[0057] The specific preparation method is as follows:

[0058] 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 , on the PEDOT:PSS hole transport layer, the active layer was prepared by spin coating (BTR-Cl:BTP-FBr-FBr=2:1, 17mg / ml, the thickness of the active layer: ≈110nm), and the obtained active layer The thin film was subjected to solvent an...

Embodiment 3

[0060] A forward organic solar cell device was prepared using BTP-FI-FI as a small molecule acceptor material. The molecular structure of BTP-FI-FI is as follows:

[0061]

[0062] The specific preparation method is as follows:

[0063] 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 , On the PEDOT:PSS hole transport layer, the active layer was prepared by spin coating (BTR-Cl:BTP-FI-FI=2:1=2:1, 17mg / ml, active layer film thickness: ≈110nm), The obtained active layer film was subjected to solvent annealing treatment (CF...

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Abstract

The invention belongs to the technical field of solar cells, and specifically discloses a locally asymmetric small-molecule acceptor material with terminal groups and its application in all-small-molecule organic solar cells. The molecular structure of the acceptor material is as follows: ) shown. The small molecule acceptor material of the present invention is constructed by the local asymmetric strategy of the acceptor end group, has good solubility, stability, photoelectricity and solution processability, and can be used as an electron acceptor for all small molecule organic solar cells. Bulk material; Compared with the symmetrical electron acceptor Y6, the photoelectric conversion efficiency of the small molecule organic solar cell prepared by the small molecule acceptor material of the present invention is higher. 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 terminal group local asymmetric small molecule acceptor material and its application in all small molecule organic solar cells. Background technique [0002] Organic solar cells can be processed by solution method and can be printed into film. Its raw materials are widely available and cheap, which can greatly reduce production costs. In recent years, organic solar cells have become one of the research hotspots in the industry. Organic solar cells are developing rapidly, and the efficiency of polymer-small molecule systems has exceeded 18%. However, polymers have disadvantages, such as polymer synthesis is difficult to control, and is very sensitive to molecular weight and molecular polymerization degree, which directly affects the photoelectric conversion efficiency of organic solar cells. . Therefore, the polymer is not suitable for marketing. [0003] Small organic mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D513/22H01L51/42H01L51/46
CPCC07D513/22H10K85/656H10K85/655H10K85/6576H10K85/657H10K30/00Y02E10/549
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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