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Composite film and its preparation method and application

A composite membrane and solid-state membrane technology, applied in the field of composite membranes, can solve problems such as quantum dot photoelectric charge transfer obstacles, and achieve the effects of facilitating photocharge transfer, improving efficiency, and improving transfer speed

Active Publication Date: 2021-01-22
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite film and its preparation method, aiming at solving the problem that in the existing quantum dot solar cells, the existence of defect energy levels at the interface between quantum dots and oxides will hinder the photoelectric charge transfer inside the quantum dots , and the problem of interfacial barriers between quantum dots and metal electrodes

Method used

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  • Composite film and its preparation method and application

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preparation example Construction

[0035] Correspondingly, an embodiment of the present invention provides a method for preparing a composite membrane, comprising the following steps:

[0036] S01. Provide fullererol, silane coupling agent, metal oxide nanoparticle solution and quantum dot solution, dehydrate after mixing the fullererol and silane coupling agent, prepare fullerene modified by silane coupling agent, Wherein, the metal oxide nanoparticle solution and the quantum dot solution are alkaline, and the general formula of the fullerene modified by the silane coupling agent is (NH 2 -R-SiO 3 ) n C m or (SH 2 -R-SiO 3 ) n C m ;

[0037] S02. depositing the fullerene modified by the silane coupling agent into a film to obtain the first fullerene solid film modified by the silane coupling agent;

[0038] S03. Depositing a metal oxide nanoparticle solution on the first fullerene solid film modified by the silane coupling agent, and performing the first annealing treatment to prepare a metal oxide sol...

Embodiment 1

[0072] A method for preparing a composite film, comprising the steps of:

[0073] S11.C 60 (OH) 36 was prepared as follows:

[0074] Add 10 mL (20 mmol / ml) of NaOH solution to the flask, and dropwise add 0.5 mL (10%) tetrabutylammonium hydroxide TBAH solution. With vigorous stirring, 12 mL containing 20 mg C 60 Toluene solution, then dropwise added 1ml (30%) of H 2 o 2 The solution was stirred for 2 hours. After standing still, the reaction mixture was divided into two layers, the upper layer was a colorless organic phase, and the lower layer was a brown-black aqueous phase. Liquid separation, filtration to remove insoluble matter in the water phase, to obtain a brown-black solution. Add methanol to precipitate a precipitate (khaki), and centrifuge to remove methanol; add water to dissolve the precipitate, then add methanol to precipitate it, and repeat this 3-4 times until NaOH and TBAH are completely washed away. The resulting precipitate was vacuum-dried at room tem...

Embodiment 2

[0088] A quantum dot sensitized battery, comprising transparent conductive glass, a composite film arranged on the transparent conductive glass, and an electrode provided on the composite film, wherein the composite film is prepared sequentially using the preparation process of Example 1 Fullerene layer, metal oxide layer, fullerene layer, quantum dot absorption layer, fullerene layer.

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Abstract

The invention provides a composite film which comprises a first fullerene layer, a metal oxide layer, a second fullerene layer, a quantum dot layer and a third fullerene layer arranged in a stacked way, materials of the first, second and third fullerene layers are fullerene, the material of the metal oxide layer includes metal oxide nanometer particles, the material of the quantum dot layer includes quantum dots, and the first fullerene layer and the metal oxide layer, the metal oxide layer and the second fullerene layer, the second fullerene layer and the quantum dot layer and the quantum dotlayer and the third fullerene layer are crosslinked and combined via silane coupling agent modification layers to form crosslinking interfaces composed of crosslinking bodies respectively, a generalformula of the crosslinking body is M@(NH-R-SiO3)nCm or M@(SH-R-SiO3)nCm, wherein @represents crosslinking combination, M represents metal in the metal oxide or in the quantum dots, Cm represents fullerene, R is selected from an alkyl or alkyl derivative, and n<m.

Description

technical field [0001] The invention belongs to the technical field of composite membranes, in particular to a composite membrane and its preparation method and application. Background technique [0002] Solar cells are a promising renewable energy source that promises to solve the growing energy crisis. Quantum dot solar cells belong to the third generation of solar cells. Their excellent characteristics enable them to maintain device performance while greatly reducing the manufacturing cost of solar cells. Therefore, they have become one of the current frontier and hot topics. [0003] Compared with bulk materials, quantum dots have the characteristic of adjustable bandgap. By adjusting the bandgap, the light absorption of quantum dots can be improved, and the energy of excitation light can also be improved to make quantum dots generate more charge carriers. However, for quantum dot solar cells, a big problem is how to quickly transfer the charge carriers generated by qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCY02E10/549
Inventor 程陆玲杨一行
Owner TCL CORPORATION