Indium Blog

Introduction to Indium Sulfide

As a primarily METALS materials supplier, we are used to most of our products appearing rather, well, boring. We see many shades of gray!

From solder paste to CIG targets, from solder wire to tabbing ribbon - they're mostly gray!

The indium sulfide (In2S3) that we produce for use as a buffer layer in thin film solar cells is quite unlike many of our other products. Visually, it is a bright orange powder or pellet. (The text in the picture is made from indium sulfide powder.) Chemically, it is like many of our other products in our metals and compounds division.

Indium Sulfide is supplied in various forms such as powder, thermal evaporation pellets, or sputtering targets. Since the powder form is very important as a starting material for other forms, we focus on achieving very high purity. We also focus on one other secret detail that helps our customers build better solar cells. (I can’t give everything away, right?)

If you’d like to know more about indium sulfide, feel free to send me an email @

Authored by previous Indium Application Manager Jim Hisert