阅读说明：本技术 一种光伏发电用硅材料及其制备方法 (Silicon material for photovoltaic power generation and preparation method thereof ) 是由 王际东 胡智信 李述刚 于 2020-07-16 设计创作，主要内容包括：本发明公开了一种光伏发电用硅材料,其重量按下列配比：8-12份晶硅籽晶、3-7份聚硅氧烷、6-10份锂化聚乙炔、1-5份二苯基硅二醇、1-5份己烷、1.6-2份甲基丙烯酰氧丙基三甲氧基硅烷、4-8份保护剂、0.6～1份二硫化钼。本发明还提出了一种光伏发电用硅材料的制备方法。本发明通过加入锂化聚乙炔,锂化聚乙炔具有极高的导电性能,在锂化聚乙炔融化后混合在硅材料内,在对光电转化过程中,极大的提高了光伏电池的光电转化率,同时加入保护剂,保护剂具有较强的耐酸耐碱性能,在硅材料使用过程中,有效的保护硅材料,提高硅材料的耐腐蚀性能。(The invention discloses a silicon material for photovoltaic power generation, which comprises the following components in parts by weight: 8-12 parts of crystalline silicon seed crystal, 3-7 parts of polysiloxane, 6-10 parts of lithiated polyacetylene, 1-5 parts of diphenyl silanediol, 1-5 parts of hexane, 1.6-2 parts of methacryloxypropyl trimethoxysilane, 4-8 parts of protective agent and 0.6-1 part of molybdenum disulfide. The invention also provides a preparation method of the silicon material for photovoltaic power generation. According to the invention, the lithiated polyacetylene is added, has extremely high conductivity, is mixed in the silicon material after being melted, greatly improves the photoelectric conversion rate of the photovoltaic cell in the photoelectric conversion process, and is added with the protective agent, so that the protective agent has stronger acid and alkali resistance, and effectively protects the silicon material and improves the corrosion resistance of the silicon material in the use process of the silicon material.)

1. The silicon material for photovoltaic power generation is characterized by comprising the following components in parts by weight:

8-12 parts of crystalline silicon seed crystal, 3-7 parts of polysiloxane, 6-10 parts of lithiated polyacetylene, 1-5 parts of diphenyl silanediol, 1-5 parts of hexane, 1.6-2 parts of methacryloxypropyl trimethoxysilane, 4-8 parts of protective agent and 0.6-1 part of molybdenum disulfide.

2. The silicon material for photovoltaic power generation according to claim 1, wherein a mass ratio of the diphenyl silanediol to the hexane is 1: 1.

3. The silicon material for photovoltaic power generation according to claim 1, wherein the protective agent is mica powder.

4. The method for producing a silicon material for photovoltaic power generation according to any one of claims 1 to 3, characterized by comprising the steps of:

s1: putting the raw materials into an internal mixer, controlling the temperature at 1500-;

s2: after the silicon material is cooled to normal temperature, the silicon material is placed in a vacuum reaction chamber, a medium is placed around the silicon material, a plurality of lasers are placed outside the vacuum reaction chamber, and the lasers are fixed through a rotating seat;

s3: the controller controls the laser to start, the rotary seat rotates at a certain angle, so that laser rays emitted by the laser move on the silicon material, meanwhile, the medium is electrified to generate plasma to be attached to the silicon material, the laser stops irradiating after 16-20min, and the silicon material is placed for 48-72 h;

s4: putting the silicon material into a reaction cavity, introducing reaction gas, adding high-frequency electricity into the reaction cavity, controlling the pressure, adding a certain protective agent, and melting, cooling and adhering the protective agent to obtain the required silicon material.

5. The method according to claim 4, wherein the reaction gas is nitrogen or an inert gas.

6. The method according to claim 4, wherein the step of tabletting in S1 comprises introducing the uniformly mixed raw material solution into a mold, placing the mold into a temperature-controlled room, gradually cooling the mold to cool the mold to room temperature, taking out the molded silicon material, and tabletting the silicon material.

7. The method as claimed in claim 6, wherein the gradual temperature reduction process comprises controlling the initial temperature of the temperature-controlled chamber to 300-400 ℃, maintaining the temperature for 10-14min, then reducing the temperature in the temperature-controlled chamber to 80-100 ℃, maintaining the temperature for 32-40min, then reducing the temperature in the temperature-controlled chamber to normal temperature, and then standing the mold to cool to normal temperature.

Technical Field

The invention relates to the technical field of silicon material preparation, in particular to a silicon material for photovoltaic power generation and a preparation method thereof.

Background

Due to the rapid development of the world economy, the demand of the world countries for energy is growing and the traditional energy is gradually exhausted, so that the energy shortage is a common problem which must be faced by the world countries in the current world. In order to solve the energy crisis, various alternative energy sources are continuously developed in various countries all over the world, and among them, photovoltaic cells are attracting attention.

With the development of photovoltaic cells, the mainstream photovoltaic cells in the market at present are silicon photovoltaic cells, a large amount of silicon materials are applied to the cells, and the existing silicon materials enable the photovoltaic cells to have low photoelectric conversion efficiency and poor corrosion resistance.

Disclosure of Invention

The invention provides a silicon material for photovoltaic power generation and a preparation method thereof, and aims to solve the problems of low photoelectric conversion efficiency and poor corrosion resistance of a photovoltaic cell in the background art.

The invention provides a silicon material for photovoltaic power generation, which comprises the following components in parts by weight:

8-12 parts of crystalline silicon seed crystal, 3-7 parts of polysiloxane, 6-10 parts of lithiated polyacetylene, 1-5 parts of diphenyl silanediol, 1-5 parts of hexane, 1.6-2 parts of methacryloxypropyl trimethoxysilane, 4-8 parts of protective agent and 0.6-1 part of molybdenum disulfide.

Preferably, the mass ratio of the diphenyl silanediol to the hexane is 1: 1.

Preferably, the protective agent is mica powder.

The invention also provides a preparation method of the silicon material for photovoltaic power generation, which comprises the following steps:

s1: putting the raw materials into an internal mixer, controlling the temperature at 1500-;

s2: after the silicon material is cooled to normal temperature, the silicon material is placed in a vacuum reaction chamber, a medium is placed around the silicon material, a plurality of lasers are placed outside the vacuum reaction chamber, and the lasers are fixed through a rotating seat;

s3: the controller controls the laser to start, the rotary seat rotates at a certain angle, so that laser rays emitted by the laser move on the silicon material, meanwhile, the medium is electrified to generate plasma to be attached to the silicon material, the laser stops irradiating after 16-20min, and the silicon material is placed for 48-72 h;

s4: putting the silicon material into a reaction cavity, introducing reaction gas, adding high-frequency electricity into the reaction cavity, controlling the pressure, adding a certain protective agent, and melting, cooling and adhering the protective agent to obtain the required silicon material.

Preferably, the reaction gas is nitrogen or an inert gas.

Preferably, in the step S1, the step of pressing into tablets includes introducing the uniformly mixed raw material liquid into a mold, placing the mold into a temperature control chamber, gradually cooling the mold to room temperature, taking out the formed silicon material, and tabletting the silicon material.

Preferably, the step-by-step temperature reduction process is that the initial temperature of the temperature control chamber is 300-400 ℃, the temperature in the temperature control chamber is reduced to 80-100 ℃ after heat preservation is carried out for 10-14min, the temperature in the temperature control chamber is reduced to normal temperature after heat preservation is carried out for 32-40min, and the mold is kept and cooled to normal temperature.

The silicon material for photovoltaic power generation and the preparation method thereof have the beneficial effects that:

by adding the lithiated polyacetylene, the lithiated polyacetylene has extremely high conductivity, is mixed in the silicon material after being melted, greatly improves the photoelectric conversion rate of the photovoltaic cell in the photoelectric conversion process, and simultaneously adds the protective agent which has stronger acid and alkali resistance, so that the silicon material is effectively protected and the corrosion resistance of the silicon material is improved in the use process of the silicon material.

Detailed Description

The invention is further illustrated by the following examples.