Sedimentation growing method of semiconductor nanocrystalline/quantum dots on single crystal silicon material

A growth method and technology of quantum dots, which are applied in semiconductor devices, sustainable manufacturing/processing, photovoltaic power generation, etc., can solve the problems of narrow crystalline silicon energy band, increase production cost, sunlight loss, etc., achieve easy industrial application, improve Utilization efficiency, stable effect of physicochemical properties
CN102184979AInactive Publication Date: 2011-09-14SHANGHAI NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI NORMAL UNIVERSITY
Publication Date
2011-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a sedimentation growing method of semiconductor nanocrystalline / quantum dots on a single crystal silicon material. The semiconductor nanocrystalline / quantum dot is composed of the materials with the following weight ratio: 1 to 100 parts of sulphur, selenium, sulfide or selenide, 1 to 100 parts of metal salt, 100-500 parts of solvent, 1-10 parts of coupling agent, a crystal silicon material and a silicon wafer. The crystal silicon material is taken as the matrix, colloidal quantum dots are composed in advance, then the coupling molecules are added, and the colloidal quantum dots are connected to the crystal silicon material through the spin coating and dispensing methods and the dip-coating technology. The semiconductor nanocrystalline / quantum dot has very stable physicochemical property, and the photoelectric conversion efficiency can not be influenced even though the quantum dot is exposed in air for a long time; and the preparation process is simple and easyto operate, the source of feed is abundant, and the quantum dot is easy for industrial applications, low in price and easy to be obtained.
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Description

technical field

[0001] The invention relates to a method for depositing and growing semiconductor nanocrystals / quantum dots on crystalline silicon materials, and belongs to the field of solar photoelectric conversion materials. Background technique

[0002] Semiconductor nanocrystals or quantum dots have the characteristics of high extinction coefficient, large intrinsic dipole moment, modulated energy gap, easy ionization, and generation of multiple excitons. As a light absorber, they are obviously superior to metal organic dyes. The thermodynamic efficiency breaks through 44%. Nano-TiO sensitized with CdSe quantum dots 2 The photoelectric efficiency of crystalline solar cells (QDSCs) reaches about 10%, the production cost is only 1 / 5-1 / 10 of that of silicon solar cells, and the life span can reach more than 20 years. It is considered to be the most promising third-generation solar cell. However, the efficiency of QDSCs still lags behind that of dye-sensitized solar cells...

Claims

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