Keithley 4200A-SCS - Page 192

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 4: Multi-frequency capacitance-
voltage unit
4200A-901-01 Rev. C / February 2017 4-99
c-2vsv-solarcell test
Make sure the solar cell is connected to the 4210-CVU (see 4210-CVU connections (on page 4-5)).
This test uses a CVU to perform a capacitance-voltage sweep on a solar cell. Capacitance is
measured on each step of the sweep. A graph (1/C
2
and C versus V) is generated from the collected
data. The Formulator calculates 1/C
2
and the doping density.
c-2vsv-solarcell Analyze sheet
The test data is displayed in the Analyze sheet:
• Cp_AC: Measured parallel capacitance.
• Gp_AC: Measured conductance.
• DCV_AC: Forced DC bias voltage.
• F_AC: Forced test frequency.
• CVU1S: Status code for each measurement. Rows highlighted in blue indicate a fault. For details,
see Measurement status (on page 6-191
).
• Formulas: Formulator calculation results.
AC = Anode to cathode.
cfsweep test
Make sure the PV cell is connected to the 4210-CVU (see 4210-CVU connections (on page 4-5)).
This test performs a frequency sweep, measuring capacitance at each frequency point, and then
generates a C versus F graph.
cfsweep Analyze sheet
The test data is displayed in the Analyze sheet:
• Cp_AC: Measured parallel capacitance.
• Gp_AC: Measured conductance.
• DCV_AC: Forced DC bias voltage.
• F_AC: Forced test frequency.
• CVU1S: Status code for each measurement. Rows highlighted in blue indicate a fault. For details,
see Measurement status (on page 6-191
).
AC = Anode to cathode.