Spacer for photovoltaic applications

A spacer for an insulating glazing unit having a first outer glazing pane, a second outer glazing pane and an intermediate glazing pane, the first outer glazing pane and the second outer glazing pane enclosing a hermetically sealed interspace, the spacer comprising:

• a spacer body comprising a first material and extending in a longitudinal direction (z) having a first outer surface and a second outer surface in a width direction (x) perpendicular to the longitudinal direction (z) for attachment to the first outer glazing pane and the second outer glazing pane, respectively, and a gas barrier comprising a second material,
• the spacer body having a cross-section (x-y) perpendicular to the longitudinal direction (z) with a first hollow chamber for accommodating a desiccant material, the first hollow chamber being completely enclosed by the spacer body in the cross-section perpendicular to the longitudinal direction (z) and arranged adjacent to the first outer surface and a second hollow chamber for accommodating the desiccant material, the second hollow chamber being completely enclosed by the spacer body in the cross-section perpendicular to the longitudinal direction (z) and arranged adjacent to the second outer surface and a groove between the first and second hollow chambers in the width direction (x) and open to a first side of the spacer in a height direction (y) perpendicular to the longitudinal direction (z) and the width direction (x),
• the gas barrier being arranged on and/or in the spacer body at a second side of the spacer in the height direction (y), the second side being opposite the first side of the spacer in the height direction (y), and
• the groove being delimited in the width direction by a first side wall and a second side wall and on the second side by a bottom wall, the groove being configured to receive the intermediate glazing pane,
• wherein the spacer comprises at least two electrically conductive portions electrically isolated from each other and positioned on or in the first side wall and/or on or in the second side wall and/or on or in the bottom wall of the groove, and
• at least a portion of each of the at least two electrically conductive portions is exposed at a surface of the groove.