# The Yellow SiC Group

> The Yellow SiC Group, now branded Y-SIC, develops and produces high-purity silicon carbide materials through a continuous manufacturing process. Its work spans semiconductor feedstock and cubic SiC electrodes for solar hydrogen research; in September 2026 SHS announced industrial and state participation to build a commercial powder plant in Dillingen.

- **Founded:** 2020
- **Headquarters:** Berlin, Germany
- **Founders:** Siegmund Greulich-Weber (Co-founder; CTO in 2023; managing director listed in current imprint), Christopher Höfener (Co-founder; CEO in 2023; managing director listed in current imprint)
- **Products:** High-purity silicon carbide powder, Samples and qualification support, Joint material development, HydroSiC
- **Notable:** DBU project measured residual impurities into the sub-ppm range., Microporous research electrodes had more than 200 times the active surface area of planar layers, according to the DBU project account., Selected among ten WECONOMY winners in 2023.

## Products & services

- **High-purity silicon carbide powder** — Continuous-process SiC materials for industrial qualification, including semiconductor source-material applications; current offering includes 3C/6H and tailored particle properties.
- **Samples and qualification support** — Material samples with certificates of analysis and support for customer approval and quality assurance.
- **Joint material development** — Application-specific grain size, particle distribution and chemical composition development.
- **HydroSiC** — Development-stage cubic SiC electrodes and photoelectrochemical cells intended to split water using sunlight without external electrical power.

## Achievements

- DBU project measured residual impurities into the sub-ppm range.
- Microporous research electrodes had more than 200 times the active surface area of planar layers, according to the DBU project account.
- Selected among ten WECONOMY winners in 2023.
- Commercial SiC plant partnership with Saarland steel industry and state announced September 2026.
- Company reports more than 20 granted and pending patents; this is not a count of granted patents alone.

## Latest updates

- **2026-09** — SHS announced participation with the State of Saarland to build Y-SIC’s first commercial SiC production plant at Dillinger.
- **2026-10** — Website observed under Y-SIC branding; reports three sites and more than 50 employees, names Alexander Zeyss CEO / Head of Sales, and describes ISO 9001 certification as in progress. Observation date, not announcement date.
- **2025-07** — European application EP4581192A2 for a photoelectric cell with SiC electrode was published.

## Links

- Website: https://y-sic.com/
- LinkedIn: https://www.linkedin.com/company/yellow-sic-group

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Profile page: https://yespress.io/the-yellow-sic-group
Published by YesPress — https://yespress.io
Last updated: 2026-10-08