Keithley Interactive SourceMeter 2450 - Page 88

Model 2450
Interactive SourceMeter® Instrument User's Manual Section 9: Measuring I-V characteristics of solar
cells
2450-900-01 Rev. C / December 2013 9-9
In the example above, the instrument is programmed to display custom text on the USER swipe
screen using the display.changescreen and display.settext commands. After the test is
finished, the display will indicate the maximum power (P
max
), the short circuit current (I
SC
), and the
open circuit voltage (V
OC
), as shown in the figure below.
Figure 47: Solar cell I-V sweep results on the USER swipe screen
After the code is executed, the measured current, voltage, and calculated power are displayed in the
Instrument Console of Test Script Builder. You can copy the data into a spreadsheet, such as
Microsoft
®
Excel
®
, for graphing and further analysis. The figure below shows the results of graphing
the data in an Excel spreadsheet. Notice that the test on the solar cell was executed with light (light
ON) and in the dark (light OFF).
Figure 48: Solar cell I-V characteristics generated with and without light