A lot of industries use ATO (Antimony doped tin oxide) as heat absorber layer. Majority of UV-Vis spectra shown that ATO absorb strongly at IR region while quite transparent at visible part.
While as long as I know, as ATO has semiconductor properties, IR absorbtion represent low band gap material. If IR is absorbed, how can ATO transmits visible light rather than absorbs it?
so it can be concluded that IR absorbtion properties of TCO is nothing to do with band gap width, in the other hand it depends on plasma frequency, is this right? Thank you very much!
IR absorbtion of ATO is related to electron concentration, called plasmonic resonance.
This is different from UV-Vis absorbance, relative to band gap. Thank you Very much!you can refer some literature about ITO nanocrystal LSPR.
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