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Application of carbon nanomaterials as cathode buffer layer in lead sulfide quantum dot solar cell

A technology for a solar cell and a cathode buffer layer, applied in the field of materials, can solve the problems of high energy consumption of solar cells, inability to greatly improve, and low photoelectric conversion efficiency.

Active Publication Date: 2016-06-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, solar cells have disadvantages such as high energy consumption and low photoelectric conversion efficiency.
Although people have used various methods to improve the conversion efficiency of solar cells to a certain extent, they have not yet been able to greatly increase the efficiency of solar cells.

Method used

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  • Application of carbon nanomaterials as cathode buffer layer in lead sulfide quantum dot solar cell
  • Application of carbon nanomaterials as cathode buffer layer in lead sulfide quantum dot solar cell
  • Application of carbon nanomaterials as cathode buffer layer in lead sulfide quantum dot solar cell

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Embodiment 1

[0056] 1) The substrate 7 is pretreated as follows: the glass substrate 7 is washed with deionized water, acetone and isopropanol successively, and then dried.

[0057] 2) if figure 1 As shown, a transparent conductive electrode 6 with a thickness of 150 nm is magnetron sputtered on a substrate 7 .

[0058] 3) Prepare zinc oxide quantum dot layer 5, lead sulfide (comprising PbS-TBAI layer 4 and PbS-EDT layer 3) and carbon nanomaterial layer 2 three kinds of active layers on the substrate with transparent conductive electrode obtained in step 2);

[0059] The specific steps include: dissolving zinc oxide quantum dots with a particle size of 5nm in chlorobenzene to obtain a solution with a concentration of 50mg / ml, spin coating at 1000rpm for 60s, and annealing the substrate at 100°C for 10min to obtain a zinc oxide quantum dot layer with a thickness of 50nm 5;

[0060]Dissolve lead sulfide quantum dots with a particle size of 5nm on it in octane to obtain a solution with a co...

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Abstract

The invention discloses the application of carbon nanomaterials as a cathode buffer layer in a lead sulfide quantum dot solar cell. The solar cell successively comprises a substrate, a transparent conductive electrode layer, a zinc oxide quantum dot layer, a PbS-TBAI layer, a PbS-EDT layer, a cathode buffer layer and a gold electrode layer from bottom to top. The cathode buffer layer is prepared by the carbon nanomaterials. In this way, the effects of electron barrier and hole transportation are realized. At the same time, the density of the defect state and the recombination of carriers are effectively reduced at the interface. Therefore, the stability of the lead sulfide quantum dot solar cell is not reduced while the performance of devices is effectively improved.

Description

technical field [0001] The invention belongs to the field of materials, and relates to the application of a carbon nanomaterial as a cathode buffer layer in a lead sulfide quantum dot solar cell. Background technique [0002] As the environmental and energy problems faced by mankind continue to deteriorate, strengthening environmental protection and developing clean energy are the focus of human attention. Therefore, in recent years, people's research on the development and utilization of solar energy has made rapid progress. As an important photoelectric energy conversion device, the research of solar cells has been paid close attention to by people. [0003] Solar cells can be divided into three categories: the first type is inorganic solid-state solar cells based on the carrier transport process in semiconductor p-n junctions, including crystalline Si solar cells and Si-based thin-film solar cells; the second type is based on organic molecular Photoelectrochemical solar...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/0296H01L31/032H01L31/0352H01L31/18
CPCH01L31/022425H01L31/0296H01L31/0324H01L31/035218H01L31/18Y02E10/50
Inventor 靳志文王吉政李玉良
Owner INST OF CHEM CHINESE ACAD OF SCI
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