Unlock instant, AI-driven research and patent intelligence for your innovation.

A perovskite-based flexible thin-film solar cell and its preparation method

A solar cell and flexible film technology, applied in the field of solar cells, can solve problems such as difficulty in fully utilizing graphene, poor contact of graphene, and easy existence of energy barriers, so as to achieve easy control of film thickness, simple and easy manufacturing process, and energy conversion high efficiency effect

Inactive Publication Date: 2017-02-01
湖南省天赐阳光太阳能有限责任公司
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Defects of the existing technology: graphene initially exhibits the function of conducting electricity and collecting electrons, but in the existing preparation methods, graphene is in poor contact with other materials, and energy barriers are likely to exist, which affects the improvement of quantum efficiency, and it is difficult to give full play to the advantages of graphene. effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A perovskite-based flexible thin-film solar cell and its preparation method
  • A perovskite-based flexible thin-film solar cell and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] Such as figure 2 As shown, a method for preparing a perovskite-based flexible thin-film solar cell includes the following steps:

[0044] (1) Pretreatment of transparent substrate: select a polyethylene terephthalate transparent film with a thickness of 0.2-1.0mm, wash with ethanol to remove floating and sink, and dry at room temperature;

[0045] (2) Spraying graphene negative electrode: Take 1g of single-layer graphene powder, ultrasonically disperse it in 20~1000ml ethanol solution, prepare graphene / ethanol solution with graphene concentration of 0.001~0.050g / ml, in electrostatic field 10 Spray on the transparent substrate under the condition of ~50kV to directly form the negative electrode layer of graphene with a thickness of 50~200nm;

[0046] (3) Spraying electron transport layer: Take 1g of single-layer graphene powder and 20g of titanium dioxide nanopowder with a particle size of 50~200nm, disperse it in 20~1000ml of ethanol solution, and spray it on the graphene un...

Embodiment 1

[0051] The preparation method of this embodiment includes the following steps:

[0052] (1) Pretreatment of transparent substrate: select a transparent polyethylene terephthalate (PET) film with a thickness of 0.6mm, wash with ethanol to remove floating and sink, and dry at room temperature;

[0053] (2) Spraying graphene negative electrode layer: Take 1g of single-layer graphene powder, ultrasonically disperse it in 200ml ethanol solution, prepare a graphene / ethanol solution with a concentration of 0.005g / ml, and spray it on the condition of an electrostatic field of 30kV. Directly form a graphene negative electrode layer with a thickness of 100 nm on the transparent substrate;

[0054] (3) Spraying the electron transport layer: Take 1g of single-layer graphene powder and 20g of titanium dioxide nanopowder with a particle size of 100nm, disperse it in 200ml of ethanol solution, and spray it on the graphene negative electrode under the condition of an electrostatic field of 30kV to f...

Embodiment 2

[0060] The only difference from Embodiment 1 is that in steps (2), (3), (4), and (5), the voltage of the electrostatic field is 10 kV. The other contents are the same as in Example 1.

[0061] The energy conversion efficiency of the perovskite-based flexible thin-film solar cell of this embodiment is 22%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
electron mobilityaaaaaaaaaa
energy conversion efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a perovskite-based flexible thin-film solar cell and a preparation method thereof. The perovskite-based flexible thin-film solar cell comprises a transparent substrate, a graphene negative electrode, an electron transport layer, a light-absorbing layer, and a graphene positive electrode. The preparation method of the perovskite-based flexible thin-film solar cell comprises: pretreatment of the transparent substrate; spraying the graphene negative electrode; spraying the electron transport layer; spraying the light-absorbing layer; spraying the graphene positive electrode; heat treatment. The present invention is formed by electrostatic spraying method, which uses a strong electrostatic field to drive raw materials to be deposited on the substrate through a nozzle. During the spraying process, the solvent volatilizes, and the coating with high density can be formed with a large force, which can effectively Overcome the defects of the prior art. Formed by electrostatic spraying method, the cost is 80% lower than that of silicon solar cells, and the energy conversion efficiency is better than that of traditional silicon solar cells. The energy conversion efficiency is as high as 27%. It can replace single crystal silicon as a new generation of flexible thin film solar cells.

Description

Technical field [0001] The invention relates to the technical field of solar cells. Background technique [0002] Organometallic halide (CH 3 NH 3 PbI 3 ) Is an organic / inorganic hybrid perovskite semiconductor material with a band gap in the near-infrared region (1.7eV), which can absorb all sunlight and part of the near-infrared light. It is a very excellent solar absorbing photovoltaic material . In recent years, with the in-depth study of the high-efficiency effects of thin-film solar cells, perovskite thin-film solar cells have gradually attracted widespread attention and reports, and their maximum efficiency can reach more than 18%, and there is a lot of room for improvement. [0003] Perovskite-based flexible thin-film solar cells mainly include two structures: one is based on perovskite-based nanocrystalline porous wide-gap semiconductor film (such as TiO 2 , ZnO, SnO 2 ) Sensitized thin film battery, the other is a porous insulating material film (such as Al 2 O 3 , ZrO 2...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01L51/42H01L51/46H01L51/44
CPCH10K71/12H10K85/30H10K30/151H10K30/81H10K2102/00Y02E10/549
Inventor 王先华廖旭
Owner 湖南省天赐阳光太阳能有限责任公司