A kind of high-efficiency crystalline silicon solar cell and preparation method thereof

A technology of solar cells and crystalline silicon, applied in the field of solar cells, can solve the problems of high hydrogen content and attenuation of solar cells, and achieve the effect of suppressing re-escape and avoiding performance attenuation

Active Publication Date: 2022-07-08
山东力诺阳光电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen content in solar cells should not be too high. Under certain temperature and light, the hydrogen will be released at a faster rate, resulting in attenuation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a high-efficiency crystalline silicon solar cell, the preparation method comprises the following steps:

[0032] (1) Pre-treatment of silicon wafers: Put the clean silicon wafers in a carbonitriding furnace, and after vacuuming, introduce a mixed gas of methane and ammonia gas, the temperature is 900 ° C, the time is 180 minutes, and the flow rate of methane is 0.9 m 3 / h, the flow rate of ammonia gas is 0.6m 3 / h, the carbon potential is 1.0%;

[0033] (2) Texturing: After the silicon wafer is cooled, the surface of the silicon wafer is texturized with a texturing liquid at 12°C. The texturing liquid includes the following raw materials by weight:

[0034] 3% sodium hydroxide, 0.2% sodium dodecylbenzenesulfonate, 8% isopropanol, and the balance is water;

[0035] (3) Diffusion: use a diffusion furnace to carry out high-temperature phosphorus diffusion on the silicon wafer to form a P-N junction on the surface of the silicon wafer, adopt the ph...

Embodiment 2

[0041] A preparation method of a high-efficiency crystalline silicon solar cell, the preparation method comprises the following steps:

[0042] (1) Pre-treatment of silicon wafers: place the clean silicon wafers in a carbonitriding furnace, and after vacuuming, introduce a mixed gas of methane and ammonia gas, the temperature is 1100 °C, the time is 150 min, and the flow rate of methane is 1.0 m 3 / h, the flow rate of ammonia gas is 0.75m 3 / h, the carbon potential is 1.2%;

[0043] (2) Texturing: After the silicon wafer is cooled, the surface of the silicon wafer is texturized with a texturing liquid at 10°C. The texturing liquid includes the following raw materials by weight:

[0044] 3% sodium hydroxide, 0.2% sodium dodecylbenzenesulfonate, 8% isopropanol, and the balance is water;

[0045] (3) Diffusion: use a diffusion furnace to carry out high-temperature phosphorus diffusion on the silicon wafer to form a P-N junction on the surface of the silicon wafer, adopt the pho...

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Abstract

The invention relates to the technical field of solar cells, in particular to a high-efficiency crystalline silicon solar cell and a preparation method thereof. The preparation method of the high-efficiency crystalline silicon solar cell includes: (1) pretreatment of silicon wafers: placing clean silicon wafers on carbon In the nitriding furnace, after vacuuming, a mixed gas of methane and ammonia gas is introduced, the temperature is 800~1200℃, the time is 30~240min, and the flow rate of methane is 0.8~1.0m 3 / h, the flow rate of ammonia gas is 0.5~0.75m 3 (2) texturing; (3) diffusion; (4) etching; (5) passivation; (6) screen printing; (7) annealing and sintering. In the present invention, by pre-processing the silicon wafer, the x : The stability of the hydrogen diffused from the H film into the silicon wafer reduces the amount of hydrogen released under a certain temperature and light.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a high-efficiency crystalline silicon solar cell and a preparation method thereof. Background technique [0002] With the continuous advancement of industrialization and the improvement of people's living standards, people's demand for energy is increasing. The reserves of traditional fossil energy such as oil and coal are limited. Green renewable energy that can replace traditional fossil energy has gradually entered the field of view of researchers , as an inexhaustible clean energy, solar energy has received great attention. At this stage, the research on solar energy mainly focuses on the fields of photothermal utilization, photoelectric utilization and photochemical utilization. [0003] Solar cells are one of the main ways to utilize solar photovoltaics, and their basic principle is to directly convert solar radiation energy into electrical energy using the photovoltai...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01L31/0216H01L31/068H01L31/18
CPCH01L31/02167H01L31/1804H01L31/1868H01L31/1864H01L31/068Y02P70/50
Inventor任现坤杨晓君仲伟佳葛永见曹振郭瑞静陈冲
Owner山东力诺阳光电力科技有限公司