How to Calculate Band Gap Energy from UV–Vis Data | Tauc Plot in OriginLab Tutorial

In this tutorial, I’ll guide you step by step on how to calculate the optical band-gap energy (Eg) using UV–Vis spectroscopy data.

We’ll focus on the Tauc plot method and cover:
✅ Importing and processing UV–Vis data in OriginLab
✅ Applying the Beer–Lambert law to calculate the absorption coefficient
✅ Using Tauc’s relation to determine the band-gap
✅ Distinguishing between direct and indirect band-gap materials

In the next video, I’ll explain the Kubelka–Munk method for diffuse reflectance (UV–DRS) data.

👉 If you find this tutorial helpful, don’t forget to like, comment, and subscribe to Nano Analysis Hub for more nanoscience and materials analysis tutorials!

▶️ WATCH NEXT – Related Tutorials in OriginLab & Materials Analysis:

• Plot Single XRD Pattern →    • How to Plot XRD Data in Origin & Index Mil...  

• Plot Multiple XRD Spectra →    • How to Plot Multiple XRD Spectra in One Gr...  

• Plot FTIR Spectra →    • How to Plot FTIR Graph in OriginPro | Labe...  

• Plot UV-Visible Spectra →    • How to plot UV visible graph in origin || ...  

• Plot TGA-DTA Data →    • How to Plot TGA-DTA Data in Originlab ||TG...  

• Bar Graph with Error Bars →    • How to Plot Bar Graph with Error Bars in O...  

• Reusability/Recycling Graph →    • How to Plot a Reusability (Recyclability) ...  

• Draw Degradation Mechanism (PowerPoint) →    • How to Draw Photocatalytic Degradation Mec...  

• Convert XRD Raw Data to ASC Format →    • How to Convert XRD Raw Data to ASC Format ...  

• Plot Multiple FTIR Spectra in One Graph →    • How to Plot Multiple FTIR Spectra in One G...  

• Label XRD Peaks with Miller Indices (hkl) →    • How to Label XRD Peaks with Miller Indices...  

• Install & Integrate X’Pert HighScore →    • How to Download, Install & Integrate X’Per...  

• Plot XRD Data with JCPDS Values in OriginLab →    • How to Plot XRD Data with JCPDS Values in ...  

• Merge Multiple Graphs in OriginLab →    • How to Merge Multiple Graphs in OriginLab ...  

• Calculate d-Spacing from HR-TEM (Gatan DM) →    • How to Calculate d-Spacing from HR-TEM usi...  

• Calculate d-Spacing from HR-TEM (ImageJ) →    • How to Calculate d-Spacing from HR-TEM Ima...  
#BandGap #UVVis #TaucPlot #OriginLab #Nanomaterials #MaterialsScience #Spectroscopy