Title:
SILVER PASTE FOR HETEROJUNCTION CELL, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/217832
Kind Code:
A1
Abstract:
The present invention relates to the technical field of solar cells. Disclosed in the present invention are a silver paste for a heterojunction solar cell, a method for preparing the silver paste, and the application thereof. The silver paste for a heterojunction cell of the present invention contains the following ingredients in parts by weight: 16-95 parts of silver powder, 15- 85 parts of silver-coated copper powder, 1-5 parts of resin A, 0.1-2 parts of a curing agent, 0.05-0.5 parts of a promoter, 0.5-1.5 parts of a dispersing agent, and 0.5-1.5 parts of resin B. The resin A contains at least one of a polyester resin and an epoxy resin. The resin B is a white carbon black modified phenolic resin. By means of the present invention, the ingredients of a silver paste and the quantities of the ingredients are selected, such that an open-circuit voltage Voc of a cell sheet using the paste is greater than or equal to 745 mV, the photoelectric conversion efficiency of a cell is greater than or equal to 23.7%, and the series resistance Rs is less than or equal to 2.4 mΩ. The volume resistivity of the paste is less than or equal to 8x10-6Ω·cm. In addition, the paste has good cohesiveness and abrasion resistance, such that by means of replacing some silver powder with silver-coated copper powder, the production cost of the silver paste is greatly reduced without a loss in electrical performance.
Inventors:
DING BINGBING (CN)
HUANG SHUMEI (CN)
HUANG SHUMEI (CN)
Application Number:
PCT/CN2021/118930
Publication Date:
October 20, 2022
Filing Date:
September 17, 2021
Export Citation:
Assignee:
GUANGZHOU RUXING TECH DEVELOPMENT CO LTD (CN)
WUXI RUXING TECH DEVELOPMENT CO LTD (CN)
WUXI RUXING TECH DEVELOPMENT CO LTD (CN)
International Classes:
H01B1/22; H01B13/00
Foreign References:
| CN113284644A | 2021-08-20 | |||
| CN110580970A | 2019-12-17 | |||
| CN101935480A | 2011-01-05 | |||
| TWI609381B | 2017-12-21 | |||
| JPH0493368A | 1992-03-26 |
Other References:
WANG ZHONG: "SiO2 Nanoparticles Modified Phenolic Resin of Materials Research", COMPUTERS AND APPLIED CHEMISTRY, BEIJING HUAGONG XUEYUAN, BEIJING, CN, vol. 30, no. 12, 28 December 2013 (2013-12-28), Beijing, CN , pages 1465 - 1470, XP055977586, ISSN: 1001-4160, DOI: 10.11719/com.app.chem20131219
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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