“…Overall, J 0,pass is in the range of 10−20 fA cm − 2 , which is just at the edge of being acceptable for the investigation presented later, but considerably larger than values achieved in the past, where, typically, J 0,pass < 4fA cm −2 has been reached, [ 24 ] and similar values have been reported also by other authors. [ 15,22 ] At this point, the reason for the rather high recombination current densities is unclear. There is a tendency toward lower J 0,pass for higher firing set temperatures T set , in accordance with earlier results.…”