Heterojunction cell, photovoltaic module and preparation method of heterojunction cell

Abstract

The invention provides a heterojunction cell, a photovoltaic module and a preparation method of the heterojunction cell, and the heterojunction cell comprises a silicon substrate, and a first intrinsic amorphous silicon layer, a first doped amorphous silicon layer, a first transparent conductive layer and a first metal electrode which are sequentially stacked on the surface of one side of the silicon substrate; the first metal electrode comprises a first main grid and a first auxiliary grid, and the first main grid is a silver main grid; the first auxiliary grid comprises a composite conductive particle, the composite conductive particle comprises a core body and a shell wrapping the peripheral surface of the core body, the core body is made of graphite or a metal material composed of at least one of copper, nickel, zinc and aluminum, and the shell is made of silver or indium tin oxide. According to the invention, the electrode structure of the heterojunction cell, the metalized material and the manufacturing process are innovatively designed, so that the current transmission performance and the cell efficiency are maintained, the silver paste consumption and the material cost are reduced, and the industrialization development of the heterojunction cell is facilitated.

Description

technical field [0001] The present application relates to the technical field of solar cells and photovoltaic modules, and in particular to a heterojunction battery, a photovoltaic module and a preparation method of the heterojunction battery. Background technique [0002] In recent years, with the rapid development of the photovoltaic industry, domestic and foreign markets have put forward higher and higher requirements for the conversion efficiency and product performance of solar cells and photovoltaic modules, which also promotes industry manufacturers to actively carry out new types of batteries, module structures and related products. The study of craftsmanship. Heterojunction (HJT) cells have the advantages of low light attenuation and low temperature coefficient, which can reduce energy consumption and reduce thermal damage to silicon substrates. It has become an important direction for the development of high-efficiency cells in the future. [0003] The heterojunct...

AI Technical Summary

Problems solved by technology

The production cost of low-temperature silver paste products used in existing heterojunction batteries is relatively high, and storage and transportation are not easy. This is also an important factor restricting the industrialization development of existing heterojunction batteries. The industry urgently needs to provide a method that can effectively reduce costs. Heterojunction battery, photovoltaic module and preparation method of the heterojunction battery

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