Dutch Startup RESiLICON Bets €900 Million on Breaking Europe's Dangerous Dependence on Chinese Silicon
Delfzijl, Thursday, 28 May 2026.
A Dutch startup is planning a €900 million plant in Delfzijl to produce polysilicon domestically, targeting 26,000 metric tons annually by 2030. Over 85% of global polysilicon currently comes from coal-reliant regions outside Europe.
A Supply Chain Wake-Up Call, Years in the Making
The COVID-19 pandemic exposed a vulnerability that European policymakers had long chosen to overlook: the continent could not manufacture basic medical masks on its own soil. That stark reality, according to RESiLICON co-founder Gosse Boxhoorn, was the immediate spark that crystallized the urgency behind the startup’s ambitions. “The immediate spark came from a collective realization during the pandemic, when Europe found itself unable to manufacture basic medical masks domestically,” Boxhoorn said in an interview conducted on May 21, 2026 [1]. The lesson, applied far beyond personal protective equipment, now drives a €900 million industrial bet on polysilicon — one of the most strategically sensitive materials in the global clean energy and semiconductor economy [1][3].
What Is Polysilicon, and Why Does It Matter for Semiconductors and Solar?
This initiative sits at the intersection of the semiconductor industry and the solar energy supply chain, making it a dual-purpose industrial project of significant strategic weight. Polysilicon — ultra-high-purity silicon refined to exacting specifications — is the foundational raw material for solar photovoltaic cells, semiconductor wafers, and silicon-anode batteries [1][3]. Without it, Europe cannot manufacture chips domestically, cannot scale its solar panel production, and cannot meet its battery technology ambitions. Polysilicon and silane gas, its gaseous chemical precursor used in chip fabrication, are described as crucial intermediate materials for solar panels, computer chips, and batteries alike [3]. The dependency is not abstract: approximately 25% of the world’s annual silver production is currently directed toward solar panel manufacturing alone [3], illustrating just how tightly interwoven these material flows have become with global clean energy infrastructure.
Delfzijl: Industrial Heritage Meets Green Industrial Future
The choice of Delfzijl as the plant’s location is deliberate and data-driven. The port city in the northern Netherlands already hosts a functioning chemicals platform in the nearby Eemshaven, which CEO Remco Rijn has cited as a direct advantage for new industrial development: “Gunstig voor een nieuwe fabriek in Delfzijl is bijvoorbeeld dat er al een chemieplatform is in de Eemshaven” — favorable for a new factory in Delfzijl is, for example, that there is already a chemicals platform in the Eemshaven [3]. Sten Wennink, director of the Samenwerkende Bedrijven Eemsregio (SBE), the regional business cooperation body, elaborated on the broader appeal of the location in May 2026, noting: “In the first place, there is space here, both physically and in terms of noise and environmental standards. In addition, the region has good energy and industrial infrastructure. And access to the seaport has traditionally made the location attractive” [2].
Financing the Vision: From €14 Million Seed Round to a €900 Million Final Decision
RESiLICON has cleared its first financial milestone. The company has secured a €14 million seed round from regional development agencies, including NOM, the Northern Netherlands Development Agency, to fund its basic design and engineering phase [1]. The project has also been designated a strategic project under the EU’s Net-Zero Industry Act (NZIA), a classification that provides regulatory streamlining and access to additional public financing mechanisms [1]. The NZIA sets a target of 40% domestic clean technology manufacturing within the EU by 2030, and RESiLICON’s Delfzijl facility is explicitly designed to contribute toward that goal [1]. The company’s planned customer base already includes early-stage collaborations with semiconductor-grade silicon supplier TopSil, solar materials firm GDI, and battery innovator LeydenJar [1].
Closing the Loop: A Circular Silicon Future in Partnership with TNO
Beyond primary production, RESiLICON is exploring a circular dimension that could significantly reduce the carbon footprint of its polysilicon over time. The company has signaled a desire to collaborate with TNO — the Netherlands Organisation for Applied Scientific Research — on recovering and reprocessing silicon from end-of-life solar panels [3][4]. TNO announced on May 15, 2026, the development of a laser-based technology capable of cleanly separating silicon cells from adhesive layers in spent solar modules, enabling high-purity material recovery without the energy penalties associated with pyrolysis [3]. Rijn has articulated the strategic logic clearly: “If we can reprocess material back to ultra-pure polysilicon, the process becomes truly circular. We want to research this with TNO, because reuse can make a very significant difference to the emissions footprint of polysilicon” [3][4]. Solar panels have a lifespan of approximately 25 years [3], meaning that a wave of decommissioned panels is approaching in the coming decade — and with it, a potential domestic feedstock stream for a facility like RESiLICON’s. The ambition is to anchor not just a manufacturing plant in Delfzijl, but an integrated, self-sustaining industrial chain for silicon in the Netherlands [3].