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Copolymer and organic solar cell using same

A copolymer, non-replaced technology, applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of cost increase, achieve the effect of improving open circuit voltage, small band gap, improving efficiency and service life characteristics

Inactive Publication Date: 2015-01-28
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various methods have been proposed to transport the generated electrons and holes to the electrodes without loss, however, in most cases additional processes are required, thus increasing the cost of fabrication

Method used

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  • Copolymer and organic solar cell using same
  • Copolymer and organic solar cell using same
  • Copolymer and organic solar cell using same

Examples

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preparation example Construction

[0156] The copolymer can be produced based on the production examples described later.

[0157] Copolymers according to the present specification can be prepared using multi-step chemical reactions. After synthesizing monomers through alkylation reactions, Grignard reactions, Suzuki coupling reactions, and Stille coupling reactions, etc., final copolymers can be synthesized through carbon-carbon coupling reactions such as Stille coupling reactions. When the substituent to be introduced is a boronic acid or a borate compound, a Suzuki coupling reaction can be used; and when the substituent to be introduced is a tributyltin compound, a Stille coupling reaction can be used; however, the method of preparation is not limited here.

[0158] In addition, the specification provides an organic solar cell including a copolymer comprising the A unit, the B unit, and the C unit.

[0159] In one embodiment of the present specification, an organic solar cell includes: a first electrode; a...

Embodiment 1

[0186] Embodiment 1. monomer synthesis-1 (the synthesis of 2,5-bis(trimethylstannyl)thiophene)

[0187]

[0188] After 2,5-dibromothiophene (9.68 g, 40.0 mmol) was placed in tetrahydrofuran (200 ml) and dissolved, the temperature was lowered to -78°C. At this temperature, 1.6M n-butyllithium (n-BuLi) dissolved in hexane (55 ml, 88 mmol) was slowly added thereto, and the mixture was stirred for 1 hour. Immediately thereafter, 1 M trimethyltin chloride dissolved in THF (100 ml, 100 mmol) was added thereto, the temperature was raised to room temperature, and the mixture was stirred for 12 hours. The solution was poured into ice, extracted 3 times with diethyl ether, washed 3 times with water, and treated with magnesium sulfate (MgSO 4 ) to remove residual water. After removing the remaining solvent under vacuum, the solution was recrystallized from methanol to give a white solid.

[0189] Yield: 73.1%

[0190] figure 1 is a schematic diagram showing the NMR spectrum of th...

Embodiment 2

[0191] Example 2. Monomer Synthesis-2 (Synthesis of 2,5-bis-trimethylstannyl-thieno[3,2-b]thiophene)

[0192]

[0193] After thieno[3,2-b]thiophene (1.5 g, 10.7 mmol) was placed in tetrahydrofuran (50 ml) and dissolved, the temperature was lowered to -78°C. At this temperature, 1.6M n-butyllithium (n-BuLi) dissolved in hexane (14.7 ml, 23.53 mmol) was slowly added thereto, and the mixture was stirred for 30 minutes. Thereafter, the temperature was raised to 0°C, the mixture was stirred at this temperature for 1 hour, and the temperature was lowered to -78°C again. 1M trimethyltin chloride dissolved in THF (26.7ml, 26.7mmol) was added thereto at once, the temperature was raised to room temperature, and the mixture was stirred for 12 hours. The solution was poured into ice, extracted 3 times with diethyl ether, washed 3 times with water, and treated with magnesium sulfate (MgSO 4 ) to remove residual water. After removing the remaining solvent under vacuum, the solution wa...

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Abstract

The present specification provides a copolymer, and an organic solar cell including one or more layers of organic material layers that include the copolymer.

Description

technical field [0001] This specification relates to a copolymer and an organic solar cell comprising the copolymer. [0002] This application claims priority and benefit from Korean Patent Application No. 10-2012-0143044 filed on Dec. 10, 2012 at the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Background technique [0003] An organic solar cell is a device that can directly convert solar energy into electricity using the photovoltaic effect. According to the material forming the thin film, solar cells can be classified into inorganic solar cells and organic solar cells. A typical solar cell is made by incorporating a p-n junction of an inorganic semiconductor, crystalline silicon (Si). Electrons and holes generated by light absorption diffuse to the p-n junction, and are accelerated by an electric field to move toward the electrode. The energy conversion efficiency in this process is defined as the ratio of elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12C08L65/00H01L31/042
CPCC08K3/04C08G61/123C08G2261/3243C08G2261/3246C08G61/126C08G2261/3223C08L65/00C08G2261/411C08G2261/91C08G2261/344C08G2261/1412H01G9/20Y02E10/549H10K85/113H10K85/151H10K85/215H10K30/30H10K30/50C08G61/12H01L31/042H10K30/20C08G75/32
Inventor 金填硕裵在顺李载澈崔祯珉李志永李幸根张松林曹根
Owner LG CHEM LTD
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