A brief summary about my project: I am conducting a project about the differential spectral responsivity measurement of solar cells under biased conditions based on the standard IEC 60904-8:2014. This measurement requires the employment of monochromatic light sources; thus, I utilized multiple high-power, narrow-band LEDs to provide a quasi-monochromatic irradiance.
I plan to use the Keithley Model 2420 Source Meter to ensure that the current generated from those quasi-monochromatic sources is equal to the short-circuited current. This is based on the idea that the source meter (SMU) will provide a reverse bias current so that the voltage across the cell, which is +0.55V when the cell is under illumination, becomes zero meaning the short-circuit conditions are met.
However, after reading the user manual and application notes from Keithley, I still did not know how to use the device properly for my measurement setup, aside from connecting the SMU in series with the cell. Would you kindly
Dear Huynh,
welcome,
I read your question and i would like to propose another easy to set operating mode of the SMU. You can operate in the zero voltage mode. Under this case you will be sure that your solar cell will be shortcircuit.
You can operate such SMU as a constant voltage mode, where you let the SMU source a a voltage acting back to back to the voltage generated from the solar cell. That is the + is connected to the anode and the negative is connected to cathode. If you made this voltage equal to zero, then you realized the shortcircuit conditions. So, you have to operate the SMU in a contestant voltage mode.
Best wishes
Dear Huynh,
welcome,
I read your question and i would like to propose another easy to set operating mode of the SMU. You can operate in the zero voltage mode. Under this case you will be sure that your solar cell will be shortcircuit.
You can operate such SMU as a constant voltage mode, where you let the SMU source a a voltage acting back to back to the voltage generated from the solar cell. That is the + is connected to the anode and the negative is connected to cathode. If you made this voltage equal to zero, then you realized the shortcircuit conditions. So, you have to operate the SMU in a contestant voltage mode.
Best wishes
Dear Huynh,
The emerging PV, DSSC, PSC, ..., have the capacity effect and hysteresis effect.
If you want to improve accuracy under I-V or IPCE measurement, some test method can refer from
https://www.researchgate.net/project/Performance-rating-measurement-of-emerging-PV-for-Outdoor-Solar-AM15G-and-Indoor-lighting/update/5a1ccc354cde267c3e6f269a
or
https://www.researchgate.net/project/Performance-rating-measurement-of-emerging-PV-for-Outdoor-Solar-AM15G-and-Indoor-lighting
Thank you.
Best wishes
Mickey
Just be a bit careful if the cell is electrochemical - these can have very long time constants and you will have to allow for these when making your measurements.
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