Ossila Solar Cell I-V Test System User Manual page 18

(III) Voltage Increment
• Set the step size in volts for changing the voltage during current-voltage measurement.
(IV) Voltage Settle Time
• Set the time in seconds between applying a voltage and measuring the current.
I. This has a maximum of 10 seconds.
(V) Illumination
• Set the illumination intensity (in mWcm
(VI) Hysteresis I-V
• This option performs a reverse current-voltage measurement after the forward current-voltage
measurement has completed.
I. This reverses the set start and end voltages and uses the same voltage increment and settle
time as the forward measurement.
9.5.2 Lifetime Parameters
(I) Duration
• Set the total duration in hours of the lifetime measurement.
(II) Time Between Repeats
• Set the time interval in minutes between performing repeat current-voltage measurements of
the device.
(III) Hold Voltage
• Set the voltage that all pixels will be held at between measurements.
• This can be set as:
I. Short-Circuit – hold at 0 V.
II. Maximum Power – hold at the average maximum power point determined from most recent
current-voltage curve(s).
III. Open-Circuit – hold at the average open-circuit voltage determined from the most recent
current-voltage curve(s).
) being used during the measurement.
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Figure 9.9. Lifetime Parameters settings.
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