Heraeus Photovoltaics launches first product outside solar cell metallization pastes

HeraGlaze comes in a slurry form, which is applied on the porous surface of the crucibles carrying polysilicon chunks that are melted and formed into silicon ingots in a DSS furnace. Image: PV Crystalox

Major metallization paste producer Heraeus Photovoltaics has launched its first commercial product outside its solar cell metallization paste domain. 

The company has targeted the multicrystalline silicon ingot manufacturing sector, accounting for more than 80% of the current wafer market with a high-purity SiO2 diffusion barrier coating dubbed HeraGlaze for enhanced crucible performance. 

“HeraGlaze opens a new chapter in our roadmap as a technology leader and provides our customers with more added value,” noted Andreas Liebheit, President of Heraeus Photovoltaics. “It’s our first product beyond solar cell metallization and another R&D landmark, which enables our customers to realize further efficiency gains.”

HeraGlaze comes in a slurry form, which is applied on the porous surface of the crucibles carrying polysilicon chunks that are melted and formed into silicon ingots in a DSS furnace. This can be done directly at the production site of the customer.

HeraGlaze acts as a high-purity SiO2 diffusion barrier and prevents that thermally induced impurities such as iron that are transferred from the crucible into the silicon ingot during the melting and crystallization process. The higher wafer yield is achieved by increasing the usable section of a silicon ingot.

According to Heraeus Photovoltaics the wafer yield is increased by up to 4% and cell efficiency is improved by 0.1%. With an assumed an annual wafer production of 50GW today, the adoption of HeraGlaze would deliver close to an additional 2GW per year of ingot/wafer output without increasing wafer production capacity.

In recent years the multicrystalline wafer sector has come under increases pressure to reduce production costs and retain a competitive cost advantage over the resurgence of monocrystalline wafer production that has lower costs via larger area wafers and a host of production innovations to close the gap between the two wafer types. 

Read Next

February 2, 2021
Large-wafer size producer Tianjin Zhonghuan Semiconductor (TZS) is to build a new 50GW 210mm (G12) mono-wafer manufacturing hub in Ningxia Hui Autonomous Region at a cost of around RMB12 Billion (US$1.86 billion).
February 2, 2021
The solar industry's two largest enterprises, GCL and LONGi have signed a major polysilicon supply deal, the first time the rivals have entered into a major business deal together.
February 1, 2021
Panasonic has announced plans to withdraw from manufacturing heterojunction (HJT) cells and modules with the closure of its manufacturing plants in Malaysia and Shimane Prefecture, Japan.
January 27, 2021
PV-Tech’s flagship PV ModuleTech conference returns, through an online platform, on 9-11 March 2021, with a focus on providing utility-scale site developers and investors a comprehensive understanding of the new module formats being sold to the market today.
January 26, 2021
‘Solar Module Super League’ (SMSL) member JA Solar has updated its capacity expansion plans for its solar cell and module assembly plant in the Yangzhou Economic and Technological Development Zone (ETDZ).
January 25, 2021
‘Solar Module Super League’ (SMSL) member GCL System Integration Technology Co (GCL-SI) has cancelled plans to build a 2.5GW ‘Shingled’ (cell) module assembly plant in Funing, Hebei Province, China and will instead shift the project to its recently-started 60GW module manufacturing hub in Hefei.

Subscribe to Newsletter

Upcoming Events

Solar Media Events
October 4, 2022
New York, USA
On-Demand Webinars, Solar Media Events
October 11, 2022
Virtual event
Upcoming Webinars
October 18, 2022
10am (EDT) / 4pm (CEST)