The recombination parameter J0

The parameter J(0), commonly used in solar cell modelling, has a deep physical meaning, which this paper intends to clarify. Upon examination, J(0) can be identified as the recombination current density in thermal equilibrium. In many cases the same equilibrium parameter J(0) can be used to describe carrier recombination under external illumination. Nevertheless, when carriers flow from the point where they are generated towards a high recombination site the value of J(0) that matters to solar cell operation differs from that in equilibrium. In addition, J(0) may in certain cases be dependent on the excess carrier concentration. We conclude by recommending that J(0) be referred to as a recombination parameter. (C) 2014 The Authors. Published by Elsevier Ltd.