Beier, J.J.BeierFischer, H.H.FischerHeidler, KlausKlausHeidlerKamps, GereonGereonKampsKunzelmann, S.S.KunzelmannZastrow, ArminArminZastrow2022-03-082022-03-081988https://publica.fraunhofer.de/handle/publica/315182A new precision measurement facility for solar cell efficiency has been installed with an actual overall measurement uncertainty of plus minus 2,3%. The measurement method and the experimental set-up are described in detail. Errors are discussed briefly and an outlook for further improvements is given in the end. (ISE)de621697conference paper