Hello!
I have a question about when you can use a Tauc plot to help estimate the experimental band gap (Eg) - I know initially it was used for semiconductors. Can you still estimate it based on the absorbance of a liquid solution or must it be in solid state?
I found one paper that claimed they did so, but I want to double check whether that is indeed correct; some people have told me that it can only be in solid state. I have attached it here: Article Undergraduate Experiment Using Absorption and Diffuse Reflec...
In particular, I am wondering if the general Tauc equation could be used or must the Tauc/Davis–Mott model and its equation 𝛼h𝜈=K(h𝜈−Eg)1⁄2 assuming that it can be done using the UV-Vis absorbance data from a solution.Thank you!
I think the energy gap of the liquid solutions can be calculated using Planck's equation (Eg (eV)=1240/(λ (nm)), Where λ is the absorption edge calculated as the intersection of the absorption curve's tangent and the abscissa coordinate.
However, it is also possible to calculate the energy gap for liquid solutions using Tauc equation if the dimensions (thickness) of the cuvette containing the liquid solution are known when its absorption spectrum is investigated using UV-visible spectrophotometer.
Katı halde veya sıvı halde olabilir. Onu kendi çalışmana göre yapacaksın. Uv kullanılırsa Katı ve sıvıda farklı olur.
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