Device and method of evaporating a material from a metal melt

A device for evaporating material from a melt, the device comprising:

• a first hollow-cylindrical crucible comprising a first side wall, a second side wall surrounding but not directly contacting the first side wall and comprising a first chamber shaped to hold a liquid between the first side wall and the second side wall;
• a second crucible surrounding and thermally coupled to the first hollow-cylindrical crucible as a cylindrical shell, the second crucible comprising the second side wall, a third side wall surrounding but not directly contacting the second side wall and comprising a second chamber shaped to hold a liquid between the second side wall and the third side wall;
• a reversed funnel-shaped element that opens towards a bottom direction, and is situated to serve as a bottom portion of the first hollow-cylindrical crucible and second crucible;
• an inner channel bounded by the first side wall;
• and
• a bottom opening of the inner channel bounded by the reversed funnel-shaped element,
• wherein the inner channel, the first hollow-cylindrical crucible, and the second crucible are concentrically arranged.