Band Gaps from Spectra

 



Band Gap from an O (1s) Spectrum

 

 



 

Spectra Useful to Estimate

Band Gaps from Main Metal Signal of Metal Oxides

Spectra Useful to Estimate 

Band Gaps from Oxygen (1s) Signal of Metal Oxides

 

 

Metal Oxide – O (1s) Signal – Band Gap

Mainly Insulating Oxides – a few are conductive

Metal Oxide – Main XPS Signal – Band Gap

Mainly Insulating Oxides – a few are conductive

 Pure Metal – Main Signal

Conductors NO Band Gap