Dear Tijmen Vermeij,

Some commercially available options are presented below:

Polished Silicon Wafer

(2447 products available)

https://www.alibaba.com/showroom/polished-silicon-wafer.html

_____

_____

Polycrystalline silicon wafers

https://www.powerwaywafer.com/polycrystalline-silicon-wafers.html

_____

_____

https://www.universitywafer.com/where-to-buy-silicon-wafers.html

_____

_____

POLYCRYSTALLINE SILICON WAFER

https://allbuyshop.ru/g/polycrystalline-silicon-wafer.html

_____

_____

This query was asked earlier. You may find in my answer.

try sigma aldrich

We sale it at MSE Supplies，https://www.msesupplies.com/pages/search-results?q=silicon%20wafer

Hi Tijmen Vermeij

You may make an inquiry at Alfa Chemistry, they offer kinds of good-quality materials.

https://www.alfa-chemistry.com/inquiry