Tech Note 303 Detail
photodiode cathode material
| Affected Products: |
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AP-9368 h/e Photoelectric Head |
| Problem/Symptom: |
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What material is the h/e System's photodiode made of?
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| PASCO Solution: |
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The cathode of the photodiode is formed by treating an evaporated layer of antimony with cesium vapor at 170 degrees C, resulting in what is believed to be a semiconductor Cs(3)Sb (Cesium-Antimony). This photocathode is characterized by a high sensitivity in the visible spectrum and a low work function. The anode of the photodiode is a nickel alloy. We have measured an average work function of 1.36 +/- 0.08 eV. |
Creation Date: 12/5/2001
Last Modified: 10/10/2003
Mod Summary:
