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Organic solar cell with high work function graphene derivative as intermediate layer and preparation

A solar cell and graphene technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of high preparation cost and low work function, and achieve the effects of low cost, simple and convenient method, and improved photoelectric conversion efficiency.

Inactive Publication Date: 2013-10-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Oxides such as molybdenum trioxide and vanadium pentoxide need to be prepared by methods such as vacuum evaporation or sputtering, and solution-based methods cannot be used to achieve low-cost preparation, resulting in high preparation costs
However, due to the low work function of graphene oxide (4.9-5.0eV), when used as the hole transport layer of organic solar cells, the holes cannot be well collected by the anode.

Method used

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  • Organic solar cell with high work function graphene derivative as intermediate layer and preparation
  • Organic solar cell with high work function graphene derivative as intermediate layer and preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Graphene oxide is configured into a 2 mg / ml aqueous solution by means of ultrasound and centrifugation, and it is spin-coated on the surface of ITO glass to form a uniform graphene oxide film with a thickness of 2-3 nanometers on the surface of ITO glass. Using the plasma treatment process, the ITO glass spin-coated with graphene oxide was placed in a vacuum chamber, the flow rate of 30sccm oxygen was introduced, the power of the power supply was set at 30W, and the post-glow treatment was 10s. XPS analysis was done with the graphene oxide films before and after treatment. It was found by XPS analysis that the amount of C=O of the graphene oxide film after oxygen plasma treatment increased by 7%, and the amount of C-C bonds decreased by 5%. It shows that oxygen atoms with higher electronegativity and carbon atoms form more C=O after oxygen plasma treatment. The work function of graphene oxide film before and after oxygen plasma treatment was tested by Kelvin probe atom...

Embodiment 2

[0028] Prepare the thin film of 2-3 nanometer graphene oxide on ITO conductive glass, on the graphene oxide thin film before and after oxygen plasma treatment, the P3HT of PCBM thin film that spin-coats 140nm thick composition ratio is 1: 1, then at 160 ℃ for 30 minutes, transferred to the thermal evaporation system to evaporate the metal electrode preparation as figure 1 The organic solar cell structure shown.

[0029] Prepare an anode on the upper surface of the substrate, spin-coat the solution prepared by graphene or graphene oxide on the surface of the anode to form a uniform film with a thickness ranging from 0.1 nm to 100 nm; then chemically treat the graphene or graphene oxide, Then prepare a photosensitive layer on the modified graphene or graphene oxide film with high work function, and then prepare a cathode intermediate layer 4 and a cathode 5 on the other side of the photosensitive layer away from the anode to prepare an organic solar cell;

[0030] Or, prepare a...

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Abstract

The invention relates to an organic solar cell which is provided with a light-sensitive layer composed of two molecule compositions, i.e. an electron donor and an electron acceptor, and electrodes arranged on the two sides of the light-sensitive layer, i.e. an anode and a cathode. The organic solar cell is characterized in that a high work function graphene derivative is arranged between the anode and the light-sensitive layer so that the efficiency of the organic solar cell can be significantly enhanced.

Description

technical field [0001] The invention relates to an organic solar cell device using a modified graphene derivative with a high work function as an anode 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 highest efficiency reaches 24%, 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 an intermediate 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 . At pr...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46
CPCY02E10/549
Inventor 张坚李灿杨栋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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