Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for printing photovoltaic electrodes of different shapes

A photovoltaic and electrode technology, applied in the direction of photovoltaic power generation, circuits, electrical components, etc., can solve problems such as equipment that takes a long time, and achieve good process stability, high precision, and simple operation.

Inactive Publication Date: 2016-07-13
SICHUAN YINHE STARSOURCE TECH CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The printing of photovoltaic cells was first done by vacuum evaporation or electroless plating. At present, the screen printing process is widely used, which has low requirements on equipment and can reduce industrial pollution. There are big deficiencies, especially in multi-paste printing, it takes a long time to debug the equipment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for printing photovoltaic electrodes of different shapes
  • Method for printing photovoltaic electrodes of different shapes
  • Method for printing photovoltaic electrodes of different shapes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for printing photovoltaic electrodes of different shapes, comprising the following steps:

[0034] Step 1. Purge the cell with a nitrogen gun for 5-10 seconds to remove dust; place the cell on a photoresist spin coater, and spin-coat a layer of 6-micron photoresist (model AZ4620) on the surface, and then Place on a hot plate at 90°C for pre-baking for 30s; the spin coating speed is 300r / min;

[0035] Step 2, put the dried battery sheet on a photolithographic plate with a circular pattern (such as figure 2 , in the ultraviolet exposure machine of a), ultraviolet light is irradiated for 11s;

[0036] Step 3. Put the battery sheet irradiated by ultraviolet light into the developer solution for development to expose the battery sheet substrate, take it out after 45 seconds, place it on a hot plate at 130°C for post-baking for 1 minute, and get Cells with circular graphics;

[0037] Step 4. Place the circular patterned battery sheet on a spin coater, spin coat a...

Embodiment 2

[0041] A method for printing photovoltaic electrodes of different shapes, comprising the following steps:

[0042] Step 1, adopt the method described in embodiment 1;

[0043] Step 2, put the dried battery sheet on a photolithographic plate with a square pattern (such as figure 2 , in the ultraviolet exposure machine of b), ultraviolet light is irradiated for 11s;

[0044] Step 3. Put the battery sheet irradiated by ultraviolet light into the developer solution for development to expose the battery sheet substrate, take it out after 45 seconds, place it on a hot plate at 130°C for post-baking for 1 minute, and get Cells with square graphics;

[0045] Step 4. Place the square patterned battery sheet on a spin coater, spin coat a layer of 20 micron front silver paste on its surface, take it out and dry it at 300°C; the speed of spin coating is 300r / min ;

[0046] Step 5. Soak the cells dried in step 4 in methanol for 3 minutes to remove the photoresist, then wash with deion...

Embodiment 3

[0049]A method for printing photovoltaic electrodes of different shapes, comprising the following steps:

[0050] Step 1. Purge the cell with a nitrogen gun for 5-10 seconds to remove dust; place the cell on a photoresist spin coater, and spin coat a layer of 5 micron photoresist (model AZ4620) on the surface, and then Place on a hot plate at 80°C for pre-baking for 60s; the rotational speed of the spin coating is 700r / min;

[0051] Step 2, put the dried battery sheet on a photolithographic plate with a triangular pattern (such as figure 2 , in the ultraviolet exposure machine of c), ultraviolet light is irradiated for 15s;

[0052] Step 3: Put the battery sheet irradiated by ultraviolet light into the developing solution for development to expose the base of the battery sheet, take it out after 50 seconds, place it on a hot plate at a temperature of 150°C for post-baking for 2 minutes, and obtain Cells with triangular graphics;

[0053] Step 4. Place the triangular patter...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Thicknessaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for printing photovoltaic electrodes of the different shapes. The method comprises the steps of photoresist applying, prebaking, photoetching exposing, developing, postbaking, paste applying, drying, photoresist removing, sintering and the like. According to the method, graphical printing coating of paste is achieved through the principle that the solubility of photoresist in solvent (such as methyl alcohol and ethyl alcohol) significantly changes after the photoresist is subjected to irreversible degradation and denaturation under ultraviolet irradiation. Compared with a traditional silk screen printing method, the method has the advantages that the defects that in the traditional silk screen printing method, print graphs are single, the paste surface is uneven, the arrises have more deckle edges, the paste particle size is limited, and line breaking occurs in virtual printing are overcome, the advantages of free graph selectivity, high precision (larger than or equal to 2 micrometers), good technological stability and the like are achieved, and a great practical value is achieved.

Description

technical field [0001] The invention belongs to the field of photovoltaic cells, and relates to a method for printing photovoltaic electrodes of different shapes, in particular to using a photolithography process to apply and print various pastes for solar cells, so as to realize the printing of arbitrary patterns of pastes. Background technique [0002] The history of modern solar energy can be traced back to French engineer Solomon de Cox. In 1615, he invented the world's first solar-driven engine that uses heated air to expand it to do work and pump water. In 1954, three scientists including Charbin of Bell Laboratories in the United States successfully developed the world's first practical monocrystalline silicon p-n junction solar cell (conversion efficiency is 6%), which marked the application of solar photovoltaics by human beings. Research has entered a new phase. [0003] In the 20th century, due to the limited resources of oil and natural gas and the influence of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01L31/0224
CPCH01L31/022425H01L31/022433Y02E10/50
Inventor 黄海云曾国平杨蔚叶根良李运钧李昕
Owner SICHUAN YINHE STARSOURCE TECH CO LTD