You are welcome. You can find the basic diode theory and applications nearly in any electronics textbook. My favourite is Microelectronics by Jacob Millman, however, it is many years that it has not been reprinted (I think the last edition was 2001). Another good textbook is Microelectronics by Sedra. I am sure that there are many good new textbooks.
Sir, after finding the ideality factor, how we can find the barrier potential and series resistance from the IV graph using origin. Plz reply as its very important for me.
I am afraid there is no simple answer to this question. The potential barrier cannot found from the IV characteristics. It depends on the doping concentration of the semiconductors. These parameters are embedded in the reverse saturation current in the diode equation. Some researchers have used modelling techniques to estimate the potential barrier height. For example, this: aip.scitation.org/doi/10.1063/1.4789989 (I am not sure if you could have access to the paper, unless you are a student or work in a place that have subscription to the journal). It is possible to find the series resistance by modelling too, but both of them need advanced techniques.
Hello, may you please explain why the ideality factor is not constant in a natural log current vs voltage graph? If you can elaborate on the recombination in the depletion layer and high carrier injection topics, that would be helpful. Thank you very much! :)
The videos provided here are for an elementary electronics course. You can find the recombination in the depletion layer and high carrier injection in more advanced books on electronic devices.
Thank you for watching. It is not log or ln, but the scale is logarithmic. Even if it was log, It didn't make any change on the slope. The ln of a value is 2.3 times the log of that value. It just changes the scale of y axis and doesn't change the shape of the graph. I hope that you find the explanation helpful.
@@drnasersedghi Thank you sir. Your explanation is very helpful. I love your videos for the brevity and clarity of explanations. This is what students need. Would you mind if I ask you a one more question? I am interested in why the ideality factor of a solar cell in the low voltage region can be less than 1. This is described in work: 10.1155/2017/8479487 (figure 5). I also discovered this when I prototyped a porous silicon solar cell in the lab. You can see IV curve obtained by me here: ibb[dot]co[slash]6nyrQFS. Here I had n=0,35 in the voltage range 0-0,025 V.
@@physmath9386 Thank you again for your interest in my video. The ideality factor is defined based on the Shockley diode equation. However, there might be some other conduction mechanisms which can deviate the diode IV characteristics from Shockley equation. These are usually modelled as series resistance and shunt resistance. At very small voltages, the shunt resistance is dominant and the diode does not follow Shockley equation. If we calculate the ideality factor in this region, we find a value less than one, but its cause is not the ideality factor in the diode equation.
The ideality factor can be calculated from the semi-logarithmic plot of normalized current versus normalized voltage shown in minutes 2:19 to 3:05. The slope of the curve equals one divided to the ideality factor. This is how the researchers calculate the indeality factor for new devices.
I have already replied to Mr Rana. For the interest of the others, if you plot the IV characteristics with a logarithmic scale for current (shown in this video), the slope of the curve is proportional to one divided by ideality factor, from which you can find the ideality factor. This is the method which is always used in scientific research on new devices.
The whole list is excelent. Thank you very much!!
Nicely explained...Thanks
Very helpful thanks
What is a good reference book for studying diode electronics? Thank you for the video.
You are welcome. You can find the basic diode theory and applications nearly in any electronics textbook. My favourite is Microelectronics by Jacob Millman, however, it is many years that it has not been reprinted (I think the last edition was 2001). Another good textbook is Microelectronics by Sedra. I am sure that there are many good new textbooks.
Sir, after finding the ideality factor, how we can find the barrier potential and series resistance from the IV graph using origin. Plz reply as its very important for me.
I am afraid there is no simple answer to this question. The potential barrier cannot found from the IV characteristics. It depends on the doping concentration of the semiconductors. These parameters are embedded in the reverse saturation current in the diode equation. Some researchers have used modelling techniques to estimate the potential barrier height. For example, this: aip.scitation.org/doi/10.1063/1.4789989 (I am not sure if you could have access to the paper, unless you are a student or work in a place that have subscription to the journal). It is possible to find the series resistance by modelling too, but both of them need advanced techniques.
Good
Thank you.
Hello, may you please explain why the ideality factor is not constant in a natural log current vs voltage graph? If you can elaborate on the recombination in the depletion layer and high carrier injection topics, that would be helpful. Thank you very much! :)
The videos provided here are for an elementary electronics course. You can find the recombination in the depletion layer and high carrier injection in more advanced books on electronic devices.
Thank you for the video sir! I have a question - why we have log(I/I0) on the Y axis but not ln(I/I0) according to the Shockley diode equation?
Thank you for watching. It is not log or ln, but the scale is logarithmic. Even if it was log, It didn't make any change on the slope. The ln of a value is 2.3 times the log of that value. It just changes the scale of y axis and doesn't change the shape of the graph. I hope that you find the explanation helpful.
@@drnasersedghi
Thank you sir. Your explanation is very helpful. I love your videos for the brevity and clarity of explanations. This is what students need.
Would you mind if I ask you a one more question? I am interested in why the ideality factor of a solar cell in the low voltage region can be less than 1. This is described in work: 10.1155/2017/8479487 (figure 5).
I also discovered this when I prototyped a porous silicon solar cell in the lab. You can see IV curve obtained by me here: ibb[dot]co[slash]6nyrQFS. Here I had n=0,35 in the voltage range 0-0,025 V.
@@physmath9386 Thank you again for your interest in my video. The ideality factor is defined based on the Shockley diode equation. However, there might be some other conduction mechanisms which can deviate the diode IV characteristics from Shockley equation. These are usually modelled as series resistance and shunt resistance. At very small voltages, the shunt resistance is dominant and the diode does not follow Shockley equation. If we calculate the ideality factor in this region, we find a value less than one, but its cause is not the ideality factor in the diode equation.
@@nasersedghi
Thank you again sir! Your videos and answers are very helpful for me.
sir, nice explanation. please tell us how to calculate ideality factor.
The ideality factor can be calculated from the semi-logarithmic plot of normalized current versus normalized voltage shown in minutes 2:19 to 3:05. The slope of the curve equals one divided to the ideality factor. This is how the researchers calculate the indeality factor for new devices.
@@drnasersedghi Thanks again
@@rajdeep7124 You are very welcome.
Hello could you test this software? Observe androidcircuitsolver on google
well what is the ideal diode
Please see my video Simple Diode Calculations 1. Ideal Diode (ua-cam.com/video/s7v69QXKMdU/v-deo.html)
Why do you keep chewing near the mic?
please sir find out the Ideality factor from dark current characteristics using origin file
I have already replied to Mr Rana. For the interest of the others, if you plot the IV characteristics with a logarithmic scale for current (shown in this video), the slope of the curve is proportional to one divided by ideality factor, from which you can find the ideality factor. This is the method which is always used in scientific research on new devices.