Preparing heterojunction solar cell method of combining wet process deposition with low temperature heat treatment

Abstract

The invention relates to a preparing heterojunction solar cell method of combining wet process deposition with low temperature heat treatment. The preparing heterojunction solar cell method of combining the wet process deposition with the low temperature heat treatment is characterized in that metal grate lines are deposited on a single-face transparent conducting layers or a double-face transparent conducting layers, the low temperature heat treatment is conducted to alloying, wherein (1) the metal grate lines at least comprise metal contact layers, metal conducting layers and metal welding layers, the metal contact layers are located on the transparent conducting layers, and the metal conducting layers, and the metal welding layers are located on the metal contact layers in sequence; (2) the wet process deposition comprises electro-deposition, or light induction deposition, or chemical deposition, or the combination of the electro-deposition, and the light induction deposition and the chemical deposition ; (3) the low temperature heat treatment alloying can form good contact and adhesion property. The preparing heterojunction solar cell method of combining the wet process deposition with the low temperature heat treatment has the advantages that the metal grate lines which have no silvers or little silvers are achieved, cost is reduced, and the low temperature heat treatment is matched with existing heterojunction solar cell processing. In a word, preparing heterojunction solar cell method of combining the wet process deposition with the low temperature heat treatment has no seed layer electrofacing, the metal layers are metal or alloy which have specific temperature characteristic, the good contact and the adhesion property can be formed with transparent conducting films under the heat treatment temperature of 250 DEG C.

Description

technical field [0001] The invention relates to a method for preparing heterojunction solar cells by combining wet deposition and low temperature heat treatment, more precisely, a method for preparing heterojunction solar cells based on wet deposition of metal grid lines and then low temperature heat treatment (low temperature sintering). The battery method belongs to the field of heterojunction solar cells. Background technique [0002] With the development of society and economy, the demand for energy continues to increase, and the energy crisis intensifies; while the consumption of energy has caused serious damage to the ecological environment, and the contradiction between the two has become increasingly prominent. In order to realize the sustainable development of social economy, renewable energy and clean energy will play an increasingly important role. As the most important energy source in the 21st century, solar energy has become a research and development hotspot ...

AI Technical Summary

Problems solved by technology

[0021] However, this method is relatively complicated, and the process steps involved in the industrialization process are cumbersome, which may easily lead to a decrease in the yield rate and an increase in the fragmentation rate

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