This paper describes the results of an intercomparison of spectroradiometers for measuring global (GNI) and direct (DNI) normal incidence spectral irradiance in the visible (VIS) and in the near infrared (NIR), together with an assessment of the impact these results may have on the calibration of the short circuit current (Isc) of triple-junction photovoltaic devices and on the relevant spectral mismatch calculation. The intercomparison was conducted by six European scientific laboratories and a Japanese industrial partner. Seven institutions and seven spectroradiometer systems, for a total of thirteen different instruments/channels using two different technologies and made by four different manufacturers were involved. This group of systems represents a good cross section of the instrumentation for solar spectrum measurements available to date. The instruments were calibrated by each partner prior the intercomparison following their usual procedure and traceability route in order to verify the entire measurement and traceability chain. The difference of measured spectra shape showed to have an impact on the calibration of a set of Iso-Type cells varying from ±2% to ±12% for middle and bottom cell, respectively.

GALLEANO Roberto;  ZAAIMAN Willem;  STRATI Cecilia;  BARTOCCI Simona;  PRAVETTONI Mauro;  MARZOLI Matteo;  FUCCI Raffaele;  LEANZA Gianni;  TIMÒ Gianluca;  MINUTO Alessandro;  CATENA Mario;  ALEO Francesco;  TAKAGI S;  AKIYAMA A;  NUÑEZ Rubèn;  BELLUARDO Giorgio; 

2015-06-19

WILEY-BLACKWELL

JRC85286

1062-7995,   

http://onlinelibrary.wiley.com/doi/10.1002/pip.2511/abstract,    https://publications.jrc.ec.europa.eu/repository/handle/JRC85286,   

10.1002/pip.2511,