True, the spectra doesn't matter much when you comparing similar cells, but the spectral response could be better for some cells than others. Incadesent sources are difficient in blue light which Silicon responds to. Getting the AM 1.5 spectra is very hard and expensive.
I just tried to mention it enpassing. I had to callibrate using two cells from a rotating pool of about 10. For a given session, if I used cell 1 & 2, then the next time I would use cell 2 & 3 to calibrate with.
Voc is more sensitive to temperature.
Jsc (V=0), J because it's current density mA/sqcm is proportional to light intensity.
If you want to do a quick sort.
Measure Voc. Voltage (open circuit)
Get a good ammeter or a feedback ammeter and measure short circuit current. Normalize to current density.
dv/dj (at V =0 ); 5 pt linear regression and
dj/dv (at I=0) is also useful
Max power is also useful; again using 5 points fit to a parabola.
I just tried to mention it enpassing. I had to callibrate using two cells from a rotating pool of about 10. For a given session, if I used cell 1 & 2, then the next time I would use cell 2 & 3 to calibrate with.
Voc is more sensitive to temperature.
Jsc (V=0), J because it's current density mA/sqcm is proportional to light intensity.
If you want to do a quick sort.
Measure Voc. Voltage (open circuit)
Get a good ammeter or a feedback ammeter and measure short circuit current. Normalize to current density.
dv/dj (at V =0 ); 5 pt linear regression and
dj/dv (at I=0) is also useful
Max power is also useful; again using 5 points fit to a parabola.
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