In this paper we analyse thecapabilities and limitations of single layer index matching coatings for the
glass/TCO or TCO/absorber interfaces in thin film solarcells.Optical models are used to evaluate the
potential gain in cell efficiencies with hypothetical ideal matchin gmaterials to minimise losses due to
reflections at internal interfaces.We suggest the range of desired optical properties of such materials,
where a net gain in cell efficiency can beachieved,and discuss the commercial benefits of such
intermediate matching layer.For some selected ternary and quaternary novel oxides available,the
potential efficiency gain due to the inclusion of an anti-reflective matching
is calculated and compared with the case of ideal matching materials.