Method for preparing transparent electrode of crystalline silicon solar cell

Abstract

The invention relates to a method for preparing a transparent electrode of a crystalline silicon solar cell, which comprises the following steps: A, an electrode sample is prepared, wherein a silver ink solution is dripped to the surface of a silicon chip with a pyramidal textured structure, and a uniformly distributed nano silver particle aggregate structure is formed on the surface of the whole silicon chip by adopting a dripping and coating method; and B, the electrode sample is sintered, wherein the electrode sample is heated through the microwave radiation so as to allow the nano silver particles to mutually fuse, thereby forming mutually connected metal nano wire / rod network structure. The preparation method provided by the invention is simple and has a low cost. The transparent electrode prepared by the method comprises micropores and mutually connected metal nano wires. The transparent electrodes prepared by the invention are arranged at the bottom of the pyramidal textured surface of the crystalline silicon solar cell and mutually connected, has the advantages of lower light reflection rate, better conductibility, and excellent potential carrier collection efficiency, can serve as a perfect substituent for a traditional silver grid electrode, and can improve the conversion efficiency of the solar battery, with reduced manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic application and photoelectric application, and in particular relates to a method for preparing a transparent electrode of a crystalline silicon solar cell. Background technique [0002] As the storage of traditional energy such as oil and coal gradually decreases on the earth, green energy solar energy, as a substitute for traditional energy, has attracted more and more attention from the world. In solar energy applications, solar cells are key elements in photovoltaic technology that directly converts sunlight into electrical energy, and are widely used in various fields. [0003] The core structure of solar cells is the P-N junction. When sunlight with energy higher than the energy of the semiconductor band gap is incident on the P-N junction of the solar cell, electron-hole pairs are generated. Under the action of the self-built electric field on the P-N junction, electrons are transferr...

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Problems solved by technology

Moreover, the distance between these gate lines is very large. In order to obtain better electrical conductivity (reduce the contact resistance of the battery), the emitters of commercial crystalline silicon solar cells are heavily doped with n+, and too high concentration of doping will lead to Increased probability of Auger recombination, which reduces overall emitter performance and cell efficiency (~10% reduction)

At the same time, the subsequent high-temperature sintering process of the silver grid will also affect the performance of the p-n junction, thereby reducing the performance of the battery (~10% reduction)

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