energysurface

Absorption

Posted on: November 17, 2010

•The promotion of electrons across the band gap is called photo generation.
•Photons with energy greater than the band gap will be absorbed to promote electrons.
•The energy of a photon can be related to its wavelength.
•Therefore the maximum cut-off wavelength for photon absorption is related to band gap as follows

λmax=hc/Eg

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: