Ossila Solar Cell I-V Test System User Manual page 20

Solar Cell I-V Test System (Manual)
(VI) Hysteresis I-V
Set whether to perform 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) Interval
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.
III. Open-Circuit – hold at the average open-circuit voltage determined from the most
recent current-voltage curve.
Note: As the voltage source is a single channel, the hold voltage will be the same for all
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Figure 9.8. Lifetime Parameters settings.
pixels being tested.
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User Manual
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