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Organic solar cell adopting ionic liquid film as interlayer

A technology of solar cells and ionic liquids, applied in circuits, photovoltaic power generation, electrical components, etc., to achieve the effects of simple and convenient methods, low cost, and improved photoelectric conversion efficiency

Inactive Publication Date: 2015-11-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing literature or patents, the use of ionic liquids as the cathode interface layer to prepare organic solar cells is still a blank

Method used

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  • Organic solar cell adopting ionic liquid film as interlayer
  • Organic solar cell adopting ionic liquid film as interlayer
  • Organic solar cell adopting ionic liquid film as interlayer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The 1-benzyl-3-methylimidazole chloride was configured into a 0.8 mg / ml methanol solution by stirring, and it was spin-coated on the surface of ITO glass. On the ionic liquid layer, a 140 nm thick P3HT:PCBM thin film with a composition ratio of 1:1 was spin-coated, and then transferred to a thermal evaporation system to evaporate a metal electrode to prepare as figure 2 The organic solar cell structure shown. From top to bottom, it includes an anode, an anode intermediate layer, a photosensitive layer, a cathode intermediate layer, a cathode, and a base layer that are sequentially laminated.

[0030] The I-V test of this type of battery shows that the short-circuit current of the device is 11.8mA / cm 2 , the fill factor is 55%, and the energy conversion efficiency is 3.8%.

Embodiment 2

[0032] The 1-benzyl-3-methylimidazole chloride was configured into a 0.8 mg / ml methanol solution by stirring, and it was spin-coated on the surface of ITO glass. A 90 nm thick PBDTTT-C:PCBM film with a composition ratio of 1:1.5 was spin-coated on the ionic liquid layer, and then transferred to a thermal evaporation system to evaporate a metal electrode to prepare as figure 2 The organic solar cell structure shown.

[0033] The I-V test of this type of battery shows that the short-circuit current of the device is 17.1mA / cm 2 , the fill factor is 61%, and the energy conversion efficiency is 7.49%.

Embodiment 3

[0035] The 1-benzyl-3-methylimidazole chloride was configured into a 0.8 mg / ml methanol solution by stirring, and it was spin-coated on the surface of ITO glass. On the ionic liquid layer, a 95nm thick PTB7:PCBM film with a composition ratio of 1:1.5 was spin-coated, and then transferred to a thermal evaporation system to evaporate a metal electrode to prepare as figure 2 The organic solar cell structure shown.

[0036] Perform I-V tests on such batteries, such as image 3 As shown, the short-circuit current of the device is 16.7mA / cm 2 , the fill factor is 69.8%, and the energy conversion efficiency is 8.40%.

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Abstract

The invention relates to an organic solar cell. The organic solar cell comprises a light-sensitive layer composed of p type semiconductors and n type semiconductors. The organic solar cell further comprises electrodes located on the two sides of the light-sensitive layer, namely a cathode and an anode. The organic solar cell is characterized in that an ionic liquid film is placed between the cathode and the light-sensitive layer. The organic solar cell efficiency can be obviously improved.

Description

technical field [0001] The invention relates to an organic solar cell device using an ionic liquid thin film as an intermediate layer. Background technique [0002] Solar cells can be classified into inorganic and organic solar cells according to the materials used. At present, inorganic solar cells mainly refer to silicon solar cells. Although its efficiency is as high as 24%, which is close to its theoretical efficiency of 30%, the high price of silicon solar cells hinders its large-scale production and application. Organic solar cells have attracted much attention due to their advantages of simple fabrication process, light weight and low cost. [0003] In the structure of bulk heterojunction organic solar cells, it is essential to add a buffer layer between the active layer and the two electrodes in order to avoid the direct contact of the donor and acceptor materials with the cathode and anode of the cell and reduce the energy conversion efficiency of the solar cell ....

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/46
CPCY02E10/549
Inventor 李灿张坚黄林泉傅平于为
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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