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N-ester group substituted bithienopyrrole conjugated polymer

A conjugated polymer and bithiophene technology, applied in the field of polymers, can solve the problems of poor electrochemical energy level matching, low hole mobility, and narrow absorption spectrum, so as to reduce the forbidden band width, enhance the power-rich characteristics, The effect of increasing the open circuit voltage

Inactive Publication Date: 2012-05-23
无锡菲迪光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problems restricting the development of polymer solar cells are the poor electrochemical energy level matching, low hole mobility and narrow absorption spectrum of conjugated polymer materials acting as electron donor materials.

Method used

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  • N-ester group substituted bithienopyrrole conjugated polymer
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  • N-ester group substituted bithienopyrrole conjugated polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Polymer II

[0035] (1) Add 30mmol of K 2 CO 3 , 2mmol of dimethylethylenediamine, and 0.5mmol of CuI were placed in a three-necked flask, and 20mL of toluene was added, stirred for 30min under nitrogen protection, then 12mmol of an alkyl-substituted amide compound was added, and then 3,3'-dibromo- 10 mmol of 2,2'-bithiophene was reacted for 24 hours under reflux. After cooling to room temperature, pour into water to terminate the reaction, extract with hexane, combine the organic phases, remove the solvent after drying, use hexane as the mobile phase, and purify by silica gel column chromatography to obtain the white crystal compound N-hexyl formate Thienopyrrole. Proton NMR spectrum (500MHz, CDCl3): 7.2 (d, 2H), 6.9 (d, 2H), 4.2 (t, 2H), 1.57 (m, 2H), 1.2~1.3 (m, 6H), 0.96 (t ,3H).

[0036] (2) N-isooctyl formate dithienopyrrole and 100 mL of tetrahydrofuran were placed in a flask under nitrogen protection. n-Butyl lithium (13.2 mmol, 2.2 M in h...

Embodiment 2

[0045] Preparation of Polymer III

[0046] (1) Add 30mmol of K 2 CO 3 , 2mmol of dimethylethylenediamine, and 0.5mmol of CuI were placed in a three-necked flask, and 20mL of toluene was added, stirred for 30min under nitrogen protection, then 12mmol of an alkyl-substituted amide compound was added, and then 3,3'-dibromo- 10 mmol of 2,2'-bithiophene was reacted for 24 hours under reflux. After cooling to room temperature, pour into water to terminate the reaction, extract with hexane, combine the organic phases, remove the solvent after drying, use hexane as the mobile phase, and purify by silica gel column chromatography to obtain the white crystal compound N-isooctyl formate Bithienopyrrole. Proton NMR spectrum (500MHz, CDCl3): 7.2 (d, 2H), 6.9 (d, 2H), 3.9 ~ 4.2 (m, 2H), 2.07 (m, 1H), 1.2 ~ 1.3 (m, 8H), 0.9 ~1.0(t,6H).

[0047] (2) N-isooctyl formate dithienopyrrole and 100 mL of tetrahydrofuran were placed in a flask under nitrogen protection. n-Butyl lithium (13.2 ...

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Abstract

The invention discloses an N-ester group substituted bithienopyrrole conjugated polymer used as an electronic donor material of a polymer solar cell. The N-ester group substituted bithienopyrrole conjugated polymer has a structural formula I as in the specification, wherein R is straight-chain and branched paraffin from C6 to C12. The N-ester group substituted bithienopyrrole conjugated polymer has the advantages that: after the polymer is used as the electronic donor material of the polymer solar cell, the HOMO (Highest Energy Occupied Molecular Orbital) energy of the donor material can be lowered effectively, a photovoltaic device with a high open circuit voltage can be obtained and the photoelectric conversion efficiency of the polymer solar cell can be increased.

Description

technical field [0001] The invention relates to a polymer, in particular to an N-ester-substituted bithienopyrrole conjugated polymer, which is used in the field of electron donor materials for polymer solar cells. Background technique [0002] Polymer solar cells have the advantages of low cost, light weight, rollability, and portability, and are the most promising solar cells. However, the main problems restricting the development of polymer solar cells are the poor electrochemical energy level matching, low hole mobility and narrow absorption spectrum of conjugated polymer materials acting as electron donor materials. In order to solve these problems, the use of D-A-D conjugated polymers with a non-aromatic ring structure can obtain broad absorption spectra and high hole mobility, and through fine modification and adjustment of substituent structures, optimized electrochemical properties can be obtained. . [0003] For a conjugated polymer material acting as an electron...

Claims

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Application Information

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IPC IPC(8): C08G61/12H01L51/46
CPCY02E10/549
Inventor 彭波韦玮高潮林群
Owner 无锡菲迪光电技术有限公司