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Copolymer containing cyclopentadiene bithiophene-benzo-bis (benzothiadiazole) copolymer and preparation method and application thereof

A technology of benzothiadiazole and dithiophene, applied in the field of cyclopentadiene-dithiophene-benzobis(benzothiadiazole) copolymer and its preparation and application, can solve the energy conversion of organic solar cells Problems such as low efficiency, wide energy bandgap, and reduced photon absorption rate

Inactive Publication Date: 2014-05-07
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polymers containing benzothiadiazole units have a wide bandgap (the energy level difference between the HOMO energy level and the LUMO energy level), which reduces the absorption rate of photons in the solar spectrum, making it possible to use Organic solar cells with polymers containing bithiazole units have low energy conversion efficiencies

Method used

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  • Copolymer containing cyclopentadiene bithiophene-benzo-bis (benzothiadiazole) copolymer and preparation method and application thereof
  • Copolymer containing cyclopentadiene bithiophene-benzo-bis (benzothiadiazole) copolymer and preparation method and application thereof
  • Copolymer containing cyclopentadiene bithiophene-benzo-bis (benzothiadiazole) copolymer and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0042] One embodiment contains the preparation method of benzo[1,2-b:4,3-b']dithiophene-benzobis(benzothiadiazole) copolymer, such as figure 1 shown, including the following steps:

[0043] Step S 100, providing compound A and compound B.

[0044] A is: B is: Among them, R 1 , R 2 for C 1 ~C 20 the alkyl group, R 3 , R 4 for C 1 ~C 20 Alkyl or C 1 ~C 16 of alkoxy.

[0045] Wherein the preparation of compound A comprises the following steps:

[0046] Step S111, adding 2-amino-5-nitroaniline to thionyl chloride (SOCl 2 ), add pyridine dropwise while stirring (the structural formula is Molecular formula is C 5 h 5 N,), wherein the solid-to-liquid ratio of 2-amino-5-nitroaniline to pyridine is 3mol:40ml, and then heated to 80°C~90°C for reflux reaction for 24 hours, then remove excess thionyl chloride, add after cooling Precipitate with deionized water, collect the solid, wash it and dry it in vacuum to obtain 5-nitro-2,1,3 benzothiadiazole.

[0047] The reac...

Embodiment 1

[0088] This example discloses poly{7,8-bis(3,7-dimethyl)octylbenzo[1,2-b:4,3-b']dithiophene-6,7-bis with the following structural formula (3,7-Dimethyl)octyl-benzo[2,1-e:3,4-e]bis(benzothiadiazole)} (containing benzo[1,2-b:4,3 -b']dithiophene-benzobis(benzothiadiazole) copolymer P1):

[0089]

[0090] The preparation process of the above-mentioned benzo[1,2-b:4,3-b']dithiophene-benzobis(benzothiadiazole) copolymer P1 is as follows:

[0091] 1.1. Preparation of compound 5-nitro-2,1,3 benzothiadiazole

[0092]

[0093] Add 2-amino-5-nitroaniline (22.95g, 0.15mol) and 100ml of thionyl chloride into a three-necked flask, stir and slowly add 2ml of pyridine dropwise, heat and reflux at 80~90°C for 24h, stop the reaction , heated to 80°C and rotary evaporated excess SOCl 2 Finally, the reaction product was cooled to room temperature, poured into a large amount of water, stirred, filtered, washed with water and then vacuum-dried to obtain 21.7 g of the product 5-nitro-2,1,3-...

Embodiment 2

[0117] This example discloses poly{7,8-di-n-decyloxybenzo[1,2-b:4,3-b']dithiophene-6-(2,7-dimethyl)octane with the following structural formula Base-7-eicosylbenzo[2,1-e:3,4-e]bis(benzothiadiazole)} (containing benzo[1,2-b:4,3-b'] Dithiophene-benzobis(benzothiadiazole) copolymer P2):

[0118]

[0119] The preparation process of the above-mentioned benzo[1,2-b:4,3-b']dithiophene-benzobis(benzothiadiazole) copolymer P2 is as follows:

[0120] 2.1. Preparation of 7,8-bis(n-decyloxy)-2,5-bis(tributyltinyl)benzo[1,2-b:4,3-b']dithiophene.

[0121]

[0122] Under the protection of nitrogen, 7,8-bis(n-decyloxy)-2,5-dibromobenzo[1,2-b:4,3-b']dithiophene (6.61g , 0.01mol), add 80ml of tetrahydrofuran solvent, slowly inject n-butyllithium (8.4mL, 2.5M, 0.02mol) with a syringe under the condition of -78℃, continue to stir the reaction for 1h, and use Inject tributyltin chloride (5.6 mL, 0.02 mol) into the syringe, react for 1 hour, then raise the temperature to room temperature a...

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Abstract

A copolymer containing benzo [1, 2-b:4, 3-b'] bithiophene-benzo-bis (benzothiadiazole) has a following structural formula: P: (shown in the Specification), wherein the R1 and R2 are alkyls from C1 to C20; the R3 and R4 are alkyls from C1-C20 or alkoxy groups from C1 to C16, and the n is an integer from 1 to 100. The energy gap of the above benzo [1, 2-b:4, 3-b'] bithiophene-benzo-bis (benzothiadiazole) copolymer is relatively narrow. The invention further provides a preparation method of the benzo [2, 1-b:3, 4-b'] bithiophene-benzo-bis (benzothiadiazole) copolymer as well as solar battery devices and organic electroluminescent devices adopting the benzo [1, 2-b:4, 3-b'] bithiophene-benzo-bis (benzothiadiazole) copolymer.

Description

technical field [0001] The invention relates to a benzo[1,2-b:4,3-b']dithiophene-benzobis(benzothiadiazole) copolymer, its preparation method and the use of the benzo[1, 2-b:4,3-b']dithiophene-benzobis(benzothiadiazole) copolymer solar cell device and organic electroluminescent device. Background technique [0002] The energy issue is a major issue of great concern to all countries in the world. Solar energy is the most ideal alternative energy source for humans in the future, and solar cells that convert solar energy into electrical energy are also research hotspots. Conjugated polymer thin film solar cells emerging in recent years have outstanding advantages such as low cost, light weight, simple manufacturing process, and can be prepared into flexible devices. In addition, organic materials are diverse and highly designable, promising to improve the performance of solar cells through material design and optimization. [0003] The benzothiadiazole unit has excellent red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/46H01L51/54
CPCY02E10/549
Inventor 周明杰管榕黎乃元黄佳乐李满园
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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