Crystalline oxides, preparation thereof and conductive pastes containing the same

Abstract

The present invention provides a novel crystalline oxide, a process for producing the crystalline oxides, a conductive paste comprising the crystalline oxides and an article comprising a substrate and an abovementioned conductive paste applied on the substrate. The present application can solve the problem that the content of the glass powder is too small to provide an appropriate pulling force and the reliability and durability of the solar cell are reduced. It is also possible to solve the problem that excessive glass powder will prevent the firing of the conductive paint and prevent the electrode from forming proper ohmic contact. During the firing of the conductive paint, the lead-tellurium-bismuth oxide crystals are heated and turned into liquid form, either alone or in combination with softened glass powder, providing appropriate corrosion and penetrating the anti-reflective layer on the front side of the solar cell, so that a good ohmic contact is formed between the conductive metal and the substrate and the conductive paint after firing forms a solar cell electrode having an appropriate physical property and excellent electrical conductivity.

Description

technical field [0001] The present application belongs to the field of oxide crystals, and in particular, relates to a novel oxide crystal, a preparation method of the oxide crystal, a conductive coating containing the oxide crystal, and an object including a substrate and the conductive coating applied to the aforementioned substrate. Background technique [0002] Conductive paints for solar cells generally contain conductive metals or their derivatives such as silver particles, glass powders such as glass containing lead oxide, and organic vehicles. Glass powders typically used for conductive paints are amorphous. [0003] Glass powder is used as an inorganic binder phase in conductive coatings. If the content of glass powder is too small, the electrode structure formed after firing will not be dense enough, and the physical properties will be reduced, so that it will not be able to provide proper pulling force, which will make the reliability of solar cells and Reduced du...

AI Technical Summary

Problems solved by technology

[0003] Glass powder is used as an inorganic binder phase in conductive coatings. If the content of glass powder is too small, the electrode structure formed after firing will not be dense enough, and the physical properties will be reduced, so that it will not be able to provide proper pulling force, which will make the reliability of solar cells and Reduced durability

On the other hand, if the content of glass powder is too high, the content of conductive metal will be relatively reduced. Too much glass powder will hinder the firing of conductive paint, so that the electrode cannot form a proper ohmic contact, or it will be excessively corroded and invade the solar cell. Substrate, resulting in lower conversion efficiency and electrical characteristics of solar cells

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