Heraeus’ ‘SOL9631’ front-side paste offers new glass chemistry for PERC cells

Facebook
Twitter
LinkedIn
Reddit
Email
The SOL9631 Series has been developed based on new glass chemistry, combined with the latest breakthrough in organic vehicle system for ultra-fine-line printing. Image: Heraeus

Heraeus Photovoltaics has launched a new PERC (Passivated Emitter Rear Contact) metallization paste. The SOL9631 front-side paste has a new and unique glass chemistry combined with a new organic vehicle system. Due to a denser microstructure it is tailored for ultra-fine line printability for screen printing.

Problem

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

The increased migration to PERC solar cells to boost conversion efficiencies has highlighted lower process (firing) temperatures are required, while providing excellent adhesion. PERC cells also need to have limited impact from LID (Light Induced Degradation).

Solution

The SOL9631 Series has been developed based on new glass chemistry, combined with the latest breakthrough in organic vehicle system for ultra-fine-line printing. As confirmed by customers SOL9631 Series has improved LID performance and improved reliability for both cells and modules. SOL9631B has a wide firing window and can be fired at low temperatures, which makes the paste specifically suitable for the application on PERC solar cells. At the same time, the paste shows excellent performance at regular firing temperatures. The paste is specifically strong in the feature of adhesion. The SOL9631 series is tailored for Ultra-fine line printability for screen printing. It supports a finger geometry that can print defect-free through a less than 30μm screen opening in high throughput mass production, resulting in an efficiency gain through reduced optical shading and less contact area.

Applications

Ultra-fine line printability for screen printing of PERC solar cells and BSF cells.

Platform

The SOL9631 series features a unique glass chemistry that enables the tolerance of low firing temperatures. After low temperature firing the microstructure of the fired finger shows a much more densified structure including the Ag-Silicon interface, enhancing adhesion, grid resistivity and solderability.

Availability

May 2016 onwards.

8 October 2024
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 8-9 October 2024 is our second PV CellTech conference dedicated to the U.S. manufacturing sector. The event in 2023 was a sell out success and 2024 will once again gather the key stakeholders from PV manufacturing, equipment/materials, policy-making and strategy, capital equipment investment and all interested downstream channels and third-party entities. The goal is simple: to map out PV manufacturing in the U.S. out to 2030 and beyond.

Read Next

Subscribe to Newsletter

Upcoming Events

Solar Media Events
April 10, 2024
Dallas, Texas USA
Solar Media Events
April 17, 2024
Lisbon, Portugal
Solar Media Events
May 1, 2024
Dallas, Texas
Solar Media Events
May 21, 2024
Napa, USA