The Suns-Voc shows a pseudo IV curve without the effect of series resistance. Does this curve show the effect of shunt resistance?
Dear Nafis,
The relation between the photocurrent Iph versus open circuit for different illumination represents the dark I-V curve of solar cells with RS, the series resistance= 0. The shunt resistance remains included. Since the effect of Rsh is dominant at the lower voltage range near the zero voltage condition, one can get Rsh and then one can subtract its current V/ Rsh from Iph which results in the ideal diode characteristics of the solar cells. From this corrected curve one can get the ideality factro of the diode.
Please such curve in the paper at the link: Article A. Zekry and G. El-Dllal, “ effect of MS contact on the elec...
Best wishes
The I(v) characteristics gives us the performance of the solar cell(jsc,voc,FF,n efficiency) this characteristics results using a model (one or two diodes),there in two cases two resistances,serie and shunt,the serie must be low ,and the shunt must be high,you can see the variation of each one in the I(v) characteristics, there are two slopes in our graphs,slope1=I/RS, slope2=1/Rshunt, see this link:https://www.google.com/url?sa=t&source=web&rct=j&url=https://m.youtube.com/watch%3Fv%3DN4n-SiMjqqM&ved=2ahUKEwjv8seSkNDnAhXLRMAKHembAqcQtwIwAHoECAkQAQ&usg=AOvVaw0Md2dyRJKD4ms3WdOFQtbY
Dear Nafis,
The relation between the photocurrent Iph versus open circuit for different illumination represents the dark I-V curve of solar cells with RS, the series resistance= 0. The shunt resistance remains included. Since the effect of Rsh is dominant at the lower voltage range near the zero voltage condition, one can get Rsh and then one can subtract its current V/ Rsh from Iph which results in the ideal diode characteristics of the solar cells. From this corrected curve one can get the ideality factro of the diode.
Please such curve in the paper at the link: Article A. Zekry and G. El-Dllal, “ effect of MS contact on the elec...
Best wishes
In the field of organic solar cells, Voc vs. light intensity (using different neutral filters) measurements is a quite common approach to determine the dominant recombination mechanism. The effect of shunt resistance is always present under open-circuit conditions. However, its effect increases with the decrease of the light intensity and for different devices becomes noticeable at the light intensity < 0.1 Sun via the deviation from the linear dependence Voc vs. ln(light intensity). You can find additional information in this paper.
Article Effect of leakage current and shunt resistance on the light ...
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