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In a photodiode,the conductivity increas...

In a photodiode,the conductivity increases when the material is exposed to light.It is found that the conductivity changes only if the wavelength is less than 620nm.What is the band gap?

Text Solution

Verified by Experts

Band gap = energy need to over come the gap
` (hc)/(lambda) = (1242eV-nm)/(620nm)`
` = 2.0eV`
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