Background

Heterojunction(HJT) solar cell has the advantages of high conversion efficiency, simple manufacturing process, thin silicon wafer application, low temperature coefficient, no LID and PID, and bifacial power generation. With the implementation of technologies such as thin silicon wafers, low-indium targets, silver coated copper, copper electroplating, busbar-free metallization, steel plate printing, bifacial microcrystalline, light-to-pattern film transfer, and butyl rubber, HJT cells have continued to make progress in efficiency enhancement and cost reduction in 2024.

HJT cells and modules have achieved large-scale mass production and shipments. In October 2024, Tongwei's THC 210 HJT module achieved a maximum output power of 776.2W and a photoelectric conversion efficiency of 24.99% at a size of 2384*1303mm. In November 2024, Huasun had an annual production capacity of 20GW for HJT, having supplied over 8GW of HJT products to more than 60 countries and regions worldwide.

Perovskite cells, all-perovskite tandem cells, and tandem cells combining perovskite with HJT, TOPCon, or XBC are the next-generation PV technologies with great potential, potentially making PV power the cheapest form of electricity in history. In June 2024, GCL achieved an efficiency of 27.34% on a 2m² large-area perovskite tandem module. In October, Renshine set a new world record with a steady-state photoelectric conversion efficiency of 28.2% for a 1.05cm² all-perovskite tandem solar cell.

Leading PV companies are actively investing in the R&D of perovskite tandem cell technologies. In May 2024, Jinko announced a conversion efficiency of 33.24% for its perovskite tandem cell based on N-type TOPCon. In June, Longi announced a photoelectric conversion efficiency of 34.6% for its crystalline silicon-perovskite tandem solar cell. In July, Trina Solar, in collaboration with more than ten companies in the industry chain, established Jiangsu Qunchuang, focusing on perovskite tandem cells. Perovskite technology needs to further enhance efficiency and long-term stability for commercial-size cells. Two-terminal tandem cells pose greater technical challenges than single-junction perovskite cells, requiring continuous R&D investment.

7^th Perovskite & Tandem Cell Technology Forum 2025 will be held on April 16-17 in Changzhou, Jiangsu, China. The forum will discuss the outlook for the PV industry and markets for HJT, perovskite, and tandem cells, how technologies such as silver coated copper, copper electroplating, 0BB metallization, bifacial microcrystalline and light-to-pattern film transfer contribute to efficiency enhancement and cost reduction in HJT, material systems and manufacturing processes for large-area industrialized perovskite and tandem cells, research on enhancing conversion efficiency and long-term stability of perovskite cells, R&D structural design of two-terminal tandem cells and four-terminal tandem modules, encapsulation technologies and materials for HJT, perovskite and tandem modules. This conference will provide ZOOM Global Online Participation and simultaneous interpretation in Chinese and English.

Topics

1. Outlook for the Photovoltaic Industry and Market Analysis of HJT, Perovskite, and Tandem Cells

2. Key Technologies and Manufacturing Processes for Heterojunction Cells with Over 26% Mass Production Efficiency

3. Thin Silicon Wafers, Low-Indium Target Materials, Bifacial Microcrystalline, and Advanced Silver Paste Enhance Cost Reduction and Efficiency Increase in HJT Cells

4. Silver-lean/Silver-free Technologies for HJT Cells: Silver Coated Copper, Copper Plating, 0BB, and Ultra-Fine Line Printing

5. Outlook for Perovskite Production Capacity and Market Opportunities in Technology, Equipment and Materials

6. Comparative Analysis of Mass Production Processes for Perovskite Cells: Dry and Wet Methods

7. Technical Challenges and Process Optimization in Solution Coating and Drying Crystallization of Perovskite Cells

8. Preparation Solutions and Key Equipment for HTL and ETL Thin Films in Perovskite Cells

9. Application of Laser Technology in the Production of Perovskite Cells

10. Technical Routes and Supply Outlook for Conductive Glass in Perovskite Cells

11. Material System, Interface Passivation, and Structural Regulation of Perovskite Cells

12. Enhancement of Conversion Efficiency and Research on Long-Term Stability of Perovskite Cells

13. Competitiveness Analysis and Efficiency Outlook for All-Perovskite Tandem Cells

14. Technical Research Challenges and Solutions for Two-Terminal Tandem Cells

15. Structural Design and Manufacturing Process of Square Meter-Scale Four-Terminal Tandem Modules

16. Ultra-Low Temperature Curing Silver Paste for Crystalline Silicon-Perovskite Tandem Cells

17. Encapsulation Technologies and Materials for Perovskite Tandem Modules

18. Testing Standards and Techniques for Heterojunction, Perovskite and Tandem Cells

19. Research and Industrialization of Flexible Perovskite Solar Cells

20. Market Potential of BIPV for HJT, Perovskite and Tandem Cells

Program

Apr. 15

17:00-20:00  Pre-conference Registration 

Apr. 16

08:30-12:30  Speech

12:30-14:00  Networking Lunch

14:00-18:30  Speech

18:30-20:00  Banquet

Apr. 17

08:30-12:30  Speech

12:30-14:00  Networking Lunch

14:00-18:30  Speech

18:30-20:00  Banquet