title: Absolute spectral responsivity measurements of solar cells by a hybrid optical technique.
abstract: An irradiance mode, absolute differential spectral response measurement system for solar cells is presented. The system is based on combining the monochromator-based approach of determining the power mode spectral responsivity of cells with an LED-based measurement to construct a curve representing the light-overfilled absolute spectral response of the entire cell. This curve can be used to predict the short-circuit current (I(sc)) of the cell under the AM 1.5 standard reference spectrum. The measurement system is SI-traceable via detectors with primary calibrations linked to the NIST absolute cryogenic radiometer. An uncertainty analysis of the methodology places the relative uncertainty of the calculated I(sc) at better than ±0.8%.
authors.affiliation: Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA. behrang.hamadani@nist.gov
authors.forename: Behrang H
authors.initials: BH
authors.lastname: Hamadani
authors.forename: John
authors.initials: J
authors.lastname: Roller
authors.forename: Brian
authors.initials: B
authors.lastname: Dougherty
authors.forename: Fiona
authors.initials: F
authors.lastname: Persaud
authors.forename: Howard W
authors.initials: HW
authors.lastname: Yoon