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Selenium Wire or Foil for Photoconductivity Demonstration

or I guess "bars" od selenium would be ok. I want to reconstruct
Willoughby's discovery of photoconductivity for a science demo. Any
body in this group know where to purchase small amounts of selenium?
Yes I know it is a hazardous material and promise to be careful.

Thanks!

Ed V.
 
S

Sjouke Burry

Jan 1, 1970
0
or I guess "bars" od selenium would be ok. I want to reconstruct
Willoughby's discovery of photoconductivity for a science demo. Any
body in this group know where to purchase small amounts of selenium?
Yes I know it is a hazardous material and promise to be careful.

Thanks!

Ed V.
Why not use copper foil for a demo?
hold the foil in a flame until nicely oxidized,
then clean a small area for electrode 1, apply
electrode 2 to the oxide, voila, a photo diode.
 
Why not use copper foil for a demo?
hold the foil in a flame until nicely oxidized,
then clean a small area for electrode 1, apply
electrode 2 to the oxide, voila, a photo diode.

I am trying to reconstruct Willoughby's discovery. Cu2O will come
further along with Grondahl and Ohl.

Thanks much,
Ed V.
 
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