Conjugated macromolecules based on hepta-fused ring units and their preparation methods and applications in solar cells

A macromolecular and conjugated technology, applied in the field of solar cells, can solve the problems of difficult energy level regulation, difficult purification, weak absorption in the visible light region, etc., and achieve the effect of strong light absorption and high charge transport performance

Active Publication Date: 2018-11-30
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, fullerene derivatives represented by PCBM also have many disadvantages, such as weak absorption in the visible light region, difficulty in energy level regulation, and difficulty in purification.
However, for the reported non-fullerene acceptor materials, it is difficult to obtain solar cells with higher photoelectric conversion efficiency (PCE), such as PCE<8.5%

Method used

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  • Conjugated macromolecules based on hepta-fused ring units and their preparation methods and applications in solar cells
  • Conjugated macromolecules based on hepta-fused ring units and their preparation methods and applications in solar cells
  • Conjugated macromolecules based on hepta-fused ring units and their preparation methods and applications in solar cells

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preparation example Construction

[0080] The present invention also provides a method for preparing the above-mentioned conjugated macromolecule based on hepta-fused ring units, wherein the method comprises:

[0081] In the presence of a basic compound and in an organic solvent, the compound represented by the following formula (2) and the compound represented by the formula (B) are dehydrated and condensed to obtain the compound represented by the formula (1); wherein,

[0082] Formula (2)

[0083] Formula (B) is selected from one or more of the following compounds:

[0084]

[0085] Among them, four R 2 independently selected from the group shown;

[0086] two r's 1 independently selected from the group shown;

[0087] Wherein, each Z is independently selected from C or Si;

[0088] Each X and each Y are each independently selected from O, S or Se;

[0089] m is an integer of 1-6;

[0090] n is an integer of 0-6;

[0091] Each R 3 , each R 4 , R 5 , each R 6 and each R 7 Each is indepen...

Embodiment 1

[0180] This example is used to illustrate the conjugated macromolecule based on the hepta-fused ring unit of the present invention and its preparation method.

[0181]

[0182] Among them, C 6 h 13 means n-hexyl

[0183] As shown in the above reaction formula, the compound represented by formula (2-1) (220 mg, 0.2 mmol; purchased from Solon Organic Optoelectronics Technology (Beijing) Co., Ltd.), the compound represented by formula (B-2) (200 mg, 1 mmol; purchased from TCI Company), chloroform (50 mL) and pyridine (10 mL, 12 mmol) were added to the reaction vessel, and argon was passed through for 30 min to remove the air, and then refluxed at 65° C. for 12 h. However, after cooling to room temperature (about 20°C), the reaction product was poured into 200mL of methanol, filtered, and the obtained precipitate was chromatographically used on a silica gel column (using 200-300 mesh silica gel, and the eluent was petroleum ether with a volume ratio of 1:2). / dichloromethane...

Embodiment 2

[0189] This example is used to illustrate the conjugated macromolecule based on the hepta-fused ring unit of the present invention and its preparation method.

[0190]

[0191] Among them, C 6 h 13 means n-hexyl

[0192] As shown in the above reaction formula, the compound shown in formula (3-1) (275mg, 0.2mmol; purchased from Solon Organic Optoelectronics Technology (Beijing) Co., Ltd.), the compound shown in formula (C-1-1) ( 116mg, 0.4mmol; purchased from Suzhou Nakai Technology Co., Ltd.), toluene (50mL) and tetrakis (triphenylphosphine) palladium (10mg, 0.009mmol) were added in the reaction vessel, and argon was passed through for 30min to remove the air, and then Reflux at 110°C for 36h. The solid obtained after spin-drying was chromatographically separated with a silica gel column (using 200-300 mesh silica gel, and the eluent was petroleum ether / dichloromethane with a volume ratio of 1:2) to obtain a dark blue solid (280mg, yield is 95%), which is the conjugated...

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Abstract

The invention relates to the field of solar cells, and discloses a conjugated macromolecule based on hepta-fused ring units, characterized in that the conjugated macromolecule is a compound represented by the following formula (1). The invention also discloses a preparation method of the above-mentioned conjugated macromolecule based on the heptafused ring unit. The present invention also provides a photovoltaic material containing the above-mentioned conjugated macromolecules based on heptafused ring units. The present invention also provides a solar battery comprising the above-mentioned conjugated macromolecules based on heptafused ring units and a preparation method thereof. The conjugated macromolecule based on the hepta-fused ring unit provided by the present invention has strong light absorption, high charge transport performance and suitable electron energy level, and is suitable for use as an electron donor or electron acceptor material in the preparation of Solar battery.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a conjugated macromolecule based on a heptafused ring unit, a preparation method thereof, and an application in solar cells. Background technique [0002] Due to the advantages of low cost, light weight, bendability, solution processability and large area preparation, organic solar cells have received extensive attention in academia. In recent years, polymer and small molecule solar cells have developed rapidly and achieved remarkable results. So far, through the optimization of molecular structure, device structure and processing technology, the photoelectric conversion efficiency of solar cells based on the blending of polymer donors or small molecule donors and fullerene acceptors has exceeded 10%. This shows the great application prospect of organic solar cells. Among them, the photoelectric conversion efficiency of the photovoltaic device is relatively high because the polymer m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D495/04H01L51/46H01L51/48
CPCC07D495/04H10K85/655H10K85/6576H10K85/657C07D495/22Y02E10/549Y02P70/50
Inventor 占肖卫林禹泽
Owner PEKING UNIV
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