I possess data on JV, current, voltage, and current density obtained from a simple diode (metal-semiconductor). Currently, I aim to plot the Richardson curve and Arrhenius plot to determine the Schottky barrier height (SBH). However, I am encountering a challenge as the plotted curve exhibits a negative slope, deviating from the typical trend. Additionally, I am uncertain about the appropriate values of Js or Io to employ, as well as the extraction method, despite my prior research efforts. Could someone provide a step-by-step guide, preferably utilizing Origin software, to extract the SBH and ideality factor from the Richardson or Arrhenius plot? I have attached the dataset for reference. Your assistance would be greatly appreciated, and I would be grateful for a sample data or worksheet demonstrating the procedure
If you want to do a full analysis including the serial resistance term as originally published by Cordes/Garfinkel
Article High voltage power Schottky diodes
the equation for J-V becomes implicit. If you have Origin Pro, there is a routine for that:
https://www.originlab.com/doc/Origin-Help/Fitting-Implicit
In our institute we use a python script for that, though, since we have to do mass analysis and analyzing hundreds of diodes is tedious work.
Jürgen Weippert Thank you Sir, I just read the article but not largely related to the extraction method using the modified Richardson plot.
the problem is instead of a negative slope i am obtaining a positive slope, W From the log J against V, current increases as the temperature also increases. Which could mean the TFE model may be in play. But however the slope isn't depicting it. Maybe i am not extracting the Js and Jo well. I tried using Js at saturated reverse current but i still got a positive slope.
OK, I just had a closer look at your graphs. The 83 K line seems to be above the 173 K line, so there is something off with the data itself. Are these graphs reproducible? Otherwise it may as well be that your diode was decaying during the measurement and then you won't get systematic curves.
Jürgen Weippert Yes, indeed. I have revised the graph, and although only the data at 83K exhibited deviation, I consistently observe a positive slope across multiple datasets with increasing current at higher temperatures. I am uncertain about the correctness of the method used for extracting Js or 0J0. I doubt its accuracy and would appreciate if you could review the method. Attached is the Excel file for your examination. Additionally, if you have a sample dataset demonstrating the fitting method and how Js and J0 were generated, I would greatly appreciate it.
Which equation are you using, exactly? The simple Shockley equation
https://en.wikipedia.org/wiki/Shockley_diode_equation
or an equation with more parameters?
Jürgen Weippert Hello, thank you for your support, i got help from a senior colleague from another university. i had to use the modified Richardson plot to get the data in linear form.
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