Ag(Ti,Zr)/rare earth crystalline silicon solar cell composite sizing agent and manufacturing method of Ag(Ti,Zr)/rare earth crystalline silicon solar cell composite sizing agent

Abstract

The invention relates to an Ag(Ti,Zr) / rare earth crystalline silicon solar cell composite sizing agent and a manufacturing method of the Ag(Ti,Zr) / rare earth crystalline silicon solar cell composite sizing agent. The Ag(Ti,Zr) / rare earth crystalline silicon solar cell composite sizing agent comprises, by mass, 0.1-0.4 parts of glass binders, 7.5-8 parts of ultra-fine silver powder, 0.2-0.5 parts of mixtures of ultra-fine TiO2 powder and ultra-fine ZrO2 powder, 0.1 parts of rare earth powder, 1-1.4 parts of organic binders and 0.3-0.4 parts of diluents. By means of the Ag(Ti,Zr) / rare earth crystalline silicon solar cell composite sizing agent and the manufacturing method, a small amount of rare earth addition Ce, Eu or Gd is doped into the sizing agent containing Ti and Zr, the rare earth is a medium for forming Ag / Si contact, the silver-silicon contact in the sintering process of cell manufacturing is compact, and the contact resistance and the electrode attachment force are further reduced. Meanwhile, the contact resistance between silk screen printing silver paste and a silicon substrate is reduced, the electrode attachment force is improved, consumption of metal silver is reduced, the crystalline silicon solar cell efficiency is improved, and the cell cost is reduced.

Description

technical field [0001] The invention relates to a slurry, in particular to an Ag(Ti, Zr) / rare earth crystalline silicon solar battery composite slurry and a preparation method thereof. Background technique [0002] As a photoelectric conversion device that directly utilizes solar energy, photovoltaic cells have been developing in two directions. One is to reduce the production cost of photovoltaic cells, and the other is to improve the photoelectric conversion efficiency of photovoltaic cells. At the same time, the reliability of photovoltaic cells is also a concern. [0003] Crystalline silicon photovoltaic cells have the advantages of high efficiency and stable performance, and will be the main force of photovoltaic power generation in the next few decades. The existing manufacturing process of crystalline silicon photovoltaic cells is as follows: [0004] The silicon wafer is inspected first, cleaned and textured, diffused and knotted, etched, phosphorus-silicate glass ...

AI Technical Summary

Problems solved by technology

[0007] 1. Silver paste is expensive, accounting for as much as 17% of the entire battery cost, resulting in high power generation costs;

[0008] 2. The total silver reserve in the world is limited, and if solar photovoltaic power generation will become the main energy source of human beings in the future, then all the silver in the world cannot meet this requirement;

[0009] 3. After the paste is sintered, the adhesion is poor, which affects the reliability of the photovoltaic module; the contact resistance of the front electrode is large, which leads to an increase in the series resistance of the battery and low photoelectric conversion efficiency

Moreover, the finer the particle size of the copper powder, the larger the specific surface area and the faster the oxidation rate, so it is impossible to form the electrode through the cheap high-temperature sintering process in the solar cell process.

Images