Keithley 4200A-SCS - Page 188

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 4: Multi-frequency capacitance-
voltage unit
4200A-901-01 Rev. C / February 2017 4-95
solarcell formulas and constants
Formulas and user-defined constants that are used for the tests are listed in alphabetical order in the
next topics. The formulas and constants are set from the Formulator for the tests.
Formula: CURR
Formula name: CURR
Units: A
Description: PV cell current. The absolute value of the current output.
Formulator entry:
CURR = ABS(ANODEI)
Formula: FF
Formula name: FF
Units: None
Description: Fill factor.
Formulator entry:
FF = (IMAX*VMAX)/(ISC*VOC)
Simplified equation:
Formula: IMAX
Formula name: IMAX
Units: A
Description: Cell current where the power output of the cell is greatest (PMAX).
Formulator entry:
IMAX = ABS(AT(ANODEI, MAXPOS(P)))
Formula: INV_C2
Formula name: INV_C2 (C)
Units: 1/F2
Description: Inverse capacitance.
Formulator entry:
INV_C2 = 1/CP_AC^2
Simplified equation: