AbstractOne regular feature planned for Progress in Photovoltaics is the publishing of solar cell and module efficiency tables summarizing the highest independently confirmed results for different technologies. These tables are expected to be of interest not only to researchers directly involved in these areas but also to those less directly involved but interested in being kept informed of the latest results with each of the different technologies or interested in an authoritative summary of these results. Other desirable outcomes may be the encouragement of research results and the further simulation of intercomparison of measurements between disignated cell test centres. Guidelines for inclusion of results into these tables are outlined and the first set of tables of results conforming to these guidelines are published.