Applicability of equivalent diode models to modeling various thin-film photovoltaic (PV) modules in a wide range of temperature and irradiance conditions

In the paper results of fitting of current-voltage (I-V) curves acquired in a wide range of irradiances and temperatures with use of equivalent either single (SEM) or double (DEM) diode model as applied to several commercial thin-film photovoltaic (PV) modules are presented. It is shown that like in case of crystalline silicon PV modules also for CIGS (CuInGaSe2) as well as CdTe thin-film modules both models may be reliably applied whereas in case a-Si (amorphous silicon), whether it is single or multi-junction structure, obtained results can not be accepted as being credible.