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A solar cell based on colloidal quantum dots and graphene as a photoanode and its preparation method

A technology of colloidal quantum dots and solar cells, which is applied in photovoltaic power generation, semiconductor/solid-state device manufacturing, circuits, etc., can solve the problems of expensive preparation cost, low energy conversion efficiency of photovoltaic devices, and cannot be greatly improved, and achieves simple preparation, Increase photoelectric conversion efficiency and facilitate effective separation

Inactive Publication Date: 2011-12-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the energy conversion efficiencies of these photovoltaic devices are much lower than their theoretical predictions and they are expensive to fabricate
Although people have used various methods to improve the conversion efficiency of solar cells to a certain extent, they have not been able to greatly increase it. Find a more effective way or countermeasure to make the actual energy conversion efficiency of solar cells close to its theoretical prediction. It has become a major topic in material physics, photovoltaic devices and energy science

Method used

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  • A solar cell based on colloidal quantum dots and graphene as a photoanode and its preparation method
  • A solar cell based on colloidal quantum dots and graphene as a photoanode and its preparation method
  • A solar cell based on colloidal quantum dots and graphene as a photoanode and its preparation method

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Embodiment 1

[0029] A solar cell based on colloidal quantum dots and graphene as a photoanode, including a photoanode based on colloidal quantum dots and graphene, an organic polymer active layer and an electrode;

[0030] The above colloidal quantum dots are narrow bandgap colloidal quantum dots PbS;

[0031] The above-mentioned organic polymer active layer is a mixture of P3HT and PCBM, wherein the mass ratio of P3HT and PCBM is 1:1; P3HT and PCBM have good energy level matching, which is conducive to the collection of charges;

[0032] The above electrode is an aluminum electrode, and aluminum is stable in air; its work function is 4.28eV.

[0033] A method for preparing a solar cell based on colloidal quantum dots and graphene as a photoanode, the specific steps are:

[0034] 1) First, wipe the ITO glass repeatedly with absorbent cotton and detergent, rinse it with deionized water, then use deionized water, acetone and isopropanol to ultrasonically clean it for 15 minutes, and use nit...

Embodiment 2

[0039] A solar cell based on colloidal quantum dots and graphene as a photoanode, including a photoanode based on colloidal quantum dots and graphene, a PEDOT:PSS hole transport layer, an organic polymer active layer, a PCBM electron transport layer and an electrode;

[0040] The above colloidal quantum dots are narrow bandgap colloidal quantum dots PbS;

[0041] The above-mentioned organic polymer active layer is a mixture of P3HT and PCBM, wherein the mass ratio of P3HT and PCBM is 1:1; P3HT and PCBM have good energy level matching, which is conducive to the collection of charges;

[0042] The above electrode is an aluminum electrode; its work function is 4.28 eV.

[0043] A method for preparing a solar cell based on colloidal quantum dots and graphene as a photoanode, the specific steps are:

[0044] 1) First, wipe the ITO glass repeatedly with absorbent cotton and detergent, rinse it with deionized water, then use deionized water, acetone and isopropanol to ultrasonically...

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Abstract

The invention relates to a solar cell by virtue of taking colloid quantum dots and graphene as a light anode and a manufacturing method thereof and belongs to the field of photoelectric conversion, new energy materials and technologies. In the manufacturing method, ITO (indium tin oxide) is taken as a framework, and the graphene and the colloid quantum dots with the different grain sizes are deposited on the framework in sequence layer by layer to form a {graphene / quantum dots} laminated film which is taken as the light anode; mixtures of organic polymers are deposited on the light anode in afilm spinning mode; and finally vacuum evaporation is carried out on an electrode on the organic polymer film to finish the manufacturing of a solar cell device. The solar cell is simple and low in structure and manufacturing and can absorb the most of light energy of incident sunlight. The light anode is provided with the graphene film with high carrier mobility, thus greatly improving the extraction of photon-generated carriers to the electrode and the transmission process, thereby improving the photoelectric conversion efficiency of the solar cell.

Description

technical field [0001] The invention relates to a solar cell based on colloidal quantum dots and graphene as a photoanode and a preparation method thereof, belonging to the fields of photoelectric conversion, new energy materials and technologies. Background technique [0002] At present, human beings are facing serious problems of deteriorating environment and increasing energy shortage. Strengthening environmental protection and developing clean energy are the focus of great attention of governments of various countries. Also extremely fast. Photovoltaic devices, which convert sunlight into electricity, are a promising technology that can harvest large amounts of electricity. In the current photovoltaic device market, solar cells based on silicon wafers (single crystal and polycrystalline) and thin-film solar cells based on amorphous silicon, CdTe, CuInGaSe2 and III-V semiconductors occupy a major share. However, the energy conversion efficiencies of these photovoltaic d...

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/46H01L51/48
CPCY02E10/50Y02E10/549
Inventor 杨盛谊赵娜张丽邹炳锁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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