Queen's Applied Sustainability/Lab protocols/Tauc Plot - Determining Optical Band Gap
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A Tauc plot is one method of determining the optical band gap in semiconductors. The square root of the product of the absorption coefficient and photon energy -(aE)^0.5 - is plotted versus photon energy. The curve should have a section of straight line. If extended to the x-axis, the x-intercept of this line gives the optical band gap.
Source: https://ascg.msm.cam.ac.uk/characterisation/uvvis.php
| Authors | Amir Nosrat, Michael Pathak |
|---|---|
| License | CC-BY-SA-3.0 |
| Cite as | "Queen's Applied Sustainability/Lab protocols/Tauc Plot - Determining Optical Band Gap". Appropedia. 2010–2026. Retrieved November 10, 2026. |