Synthetic hybrid nanoinks by solvothermal refluxing method and selenization for preparation of Cu2SnSe3(CTSe) thin film solar cell absorbers

Autor: Yi-Wei Hu, 胡逸威
Rok vydání: 2018
Druh dokumentu: 學位論文 ; thesis
Popis: 106
In this paper, a simple, low-cost non-vacuum solvothermal refluxing method is used to obtain a I-IV-VI ternary compound Cu2SnSe3(CTSe) film after selenization heat treatment. The CTSe film is suitable as an absorber layer for light sensors and thin film solar cells. First, we successfully synthesized a mixed nano ink of Cu2Se and SnSe2 and CuSe and SnSe2 by adding a new organic solvent Polyetheramine(D400) by non-vacuum solvothermal reflux method, and both used a stoichiometric ratio of 2:1:3. The ratio of copper, tin and selenium was obtained by heat treatment by selenization to obtain a ternary single phase Cu2SnSe3(CTSe) film. The former has a selenization temperature of 550°C and the heating time is 5 minutes, while the latter has a selenization temperature of 550°C and a heating time of 15 minutes. Finally, because the quality of the film is not enough for us to make further applications, so we will try to look at the new preparation method to improve the crystallization and compactness of the film in the next chapter. Next, in order to improve the quality of the film, Cu2SnSe3(CTSe) single phase and CuSe and SnSe2 hybrid phase precursor film were successfully prepared by non-vacuum solvothermal refluxing method and centrifugal powders and blade coating. CTSe ternary single phase was obtained by rapid selenization heat treatment under pressure. The best conditions for the two groups are a selenization temperature of 500°C and a heating time of 60 minutes. Finally, compared to the experimental method in the previous chapter, we think this is a way to find an improvement. Although the crystallinity and compactness have a certain degree of improvement in quality, but the quality of the film after selenization may not be very stable, so we can still carry out more tests and compare the operation methods of the blade coating, to continue to do related applications.
Databáze: Networked Digital Library of Theses & Dissertations
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