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Convection assembly deposition method-based lead sulfide colloid quantum-dot solar cell and fabrication method thereof

A technology of colloidal quantum dots and solar cells, which is used in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve the problems of wasting quantum dot materials and complicated preparation processes, and achieves improved interface contact, improved morphology, and uniform film. Excellent effect

Inactive Publication Date: 2019-08-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the spraying method can effectively improve the quality of quantum dot films and realize large-scale preparation of devices, the preparation process is very complicated, requiring dozens of cycles of spraying, and a lot of quantum dot materials are wasted.

Method used

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  • Convection assembly deposition method-based lead sulfide colloid quantum-dot solar cell and fabrication method thereof
  • Convection assembly deposition method-based lead sulfide colloid quantum-dot solar cell and fabrication method thereof
  • Convection assembly deposition method-based lead sulfide colloid quantum-dot solar cell and fabrication method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, a colloidal quantum dot solar cell was prepared by a convective assembly method.

[0041] (1) Preparation of zinc oxide electron transport layer:

[0042] The ITO conductive glass was ultrasonically cleaned sequentially by deionized water, detergent, isopropanol, and acetone, and then the zinc oxide electron transport layer was prepared. The invention adopts two different types of zinc oxide electron transport layers, one of which is a planar structure electron transport layer based on zinc oxide nanocrystals, and the other is an ordered zinc oxide nanowire array electron transport layer.

[0043] a) Preparation of ZnO nanocrystals with planar structure:

[0044] Zinc acetate dihydrate (1.1 g) was transferred to a three-necked flask and dissolved in methanol solvent (76 ml), then the solution was heated to 60 °C under nitrogen atmosphere; potassium hydroxide (0.57 g) was dissolved in methanol (24 ml) and poured into a separatory funnel, then dropwise ...

Embodiment 2

[0056] In this embodiment, the photoelectric performance of the solar cell based on the zinc oxide nanocrystal planar structure electron transport layer is tested.

[0057]Under AM1.5 simulated light source (calibrated with NREL-certified standard silicon cells), at 100mW / cm 2 The power of the quantum dot solar cell prepared in Example 1 I-V The curves are compared and tested, and the results are as follows figure 2 and shown in Table 1.

[0058] See attached figure 2 , is measured under the AM1.5 solar simulator for the planar quantum dot device prepared by spin coating method and convective assembly deposition method in the present invention under dry or humid air conditions (relative humidity is about 10% or 60% respectively) The current-voltage curve diagram.

[0059] Table 1 shows the photovoltaic performance parameters of quantum dot solar cells obtained under different humidity conditions by convective assembly deposition method and spin coating method measured u...

Embodiment 3

[0067] In this embodiment, a bulk heterojunction quantum dot solar cell based on a zinc oxide nanowire array is tested.

[0068] Under AM1.5 simulated light source, at 100mW / cm 2 The power of the quantum dot solar cell based on the zinc oxide nanowire array prepared in Example 1 I-V The curves are compared and tested, and the results are as follows Figure 5 and shown in Table 2.

[0069] See attached Figure 5 , is the current-voltage curve measured under the AM1.5 solar simulator for the preparation of bulk heterojunction quantum dot solar cells based on zinc oxide nanowire arrays in the present invention. From Figure 5 It can be seen from Figure a in the figure that the photoelectric conversion efficiency of the bulk heterojunction quantum dot solar cell device obtained by the convection assembly method in the method of the present invention is significantly higher than that of the quantum dot solar cell obtained by the spin coating method. Among them, the efficiency...

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Abstract

The invention discloses a convection assembly deposition method-based lead sulfide colloid quantum-dot solar cell and a fabrication method thereof. The lead sulfide quantum-dot solar cell is fabricated by a convection assembly deposition method, attractive forces among quantum dots and between quantum-dot substrates are increased, so that the quantum-dot average distance is reduced, the permeationeffect between the quantum dots and an array structure substrate is improved, a closely-stacked quantum-dot thin film is formed, the resistance of the quantum dots on an air atmosphere can be obviously improved during the expression and fabrication process of a quantum-dot photovoltaic device, and a bulk heterojunction quantum-dot solar cell with a favorable permeation structure is obtained. Since a temperature of the convection assembly process is relatively low, the quantum-dot device can be compatible with a flexible substrate, the process is performed in air, and the process is simple. With the lead sulfide quantum-dot solar cell disclosed by the technical scheme, the morphology of the quantum-dot thin film is effectively improved, the photoelectric conversion efficiency of the quantum-dot photovoltaic device is further improved, the quantum-dot semiconductor device is fabricated and used on a large scale, and the lead sulfide quantum-dot solar cell has a positive effect on commercial promotion.

Description

technical field [0001] The invention relates to a lead sulfide colloidal quantum dot solar cell based on a convective assembly deposition method and a preparation method thereof, belonging to the technical field of photovoltaic materials. Background technique [0002] The convective assembly deposition method is a method of assembling colloidal particles driven by evaporative fluid and capillary force to form a film, which can prepare a large-area uniform and orderly arranged single-layer particle film. So far, this technology has been widely used in the fields of large-area preparation and surface modification of various electronic devices. At present, the mechanism research of the convective assembly deposition method is mainly based on two models. First, due to the convection of the nanoparticles during the deposition process, the particles in the solution will spontaneously move to the meniscus contact line of the solution / air interface, which is the well-known " The ph...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/30H10K30/152H10K2102/00H10K2102/101Y02E10/549Y02P70/50
Inventor 马万里史国钲佐川尚
Owner SUZHOU UNIV
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