Post B5EZv96U33mgkotSl6 by q3k@social.hackerspace.pl
 (DIR) More posts by q3k@social.hackerspace.pl
 (DIR) Post #B5EU3HbdijwtiRxnCy by fafo@social.fa-fo.de
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       Did we just made a Schottky diode?Al on n-doped Si. Random Fe contacts to Al and Si to measure. Positive lead to Si, negative to Al.X = V (2V per division)Y = I (100mA per 1V, so 5mA per division.)(the I/V curve is a composite image of two waveforms)Si has its protective oxide layer forcefully removed using abrasive methods (ie. sandpaper [!] - still working on being able to handle HF safely).Not sure if it matters, but the Al is thermally evaporated aluminum foil from EDEKA.
       
 (DIR) Post #B5EU3I2E7tDT2uP1eK by wolf480pl@mstdn.io
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       @fafoso cool!do you plan to measure its (differential) capacitance vs voltage when reverse-biased?
       
 (DIR) Post #B5EZv96U33mgkotSl6 by q3k@social.hackerspace.pl
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       @wolf480pl @fafo We could do that, but I'm not sure how involved the test setup is...FWIW this was just a simple test that we did spontaneously with the tools/materials we had - not sure spending much time qualifying the results makes sense?
       
 (DIR) Post #B5F1n52o3QnoZ37Fg0 by xeno@hexokina.se
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       @fafo@social.fa-fo.de lol EDEKA coming in clutchDid you do a comparison with uncoated Si to check that the diode is being formed at the Si-Al interface and not the Si-Fe interface with the clips? That’s certainly a promising I-V curve, super cool to see!
       
 (DIR) Post #B5F1n5EVLw9z9KaauW by fafo@social.fa-fo.de
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       @xeno Yes, I checked already, Fe/Si/Fe seems ohmic, maybe with a _slight_ nonlinearity - but not nearly as pronounced as  Fe/Al/Si/Fe above. But it's difficult to get a low resistance path to measure that well right now...~q3k
       
 (DIR) Post #B5F1n5SKWXDdqD3dSa by q3k@social.hackerspace.pl
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       @fafo @xeno (more measurements and verification will follow, but we need to get a better curve tracing and probing setup - this was all quick and dirty)
       
 (DIR) Post #B5FDlduqd90LaUTTaS by Erpel@hai.z0ne.social
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       @fafo@social.fa-fo.de An X-Y-Diagram of Voltage against Current would be nice to see, but I don't know if your oscilloscope is capable of it (basically a two channel image)