How to Calculate Band Gap Energy from UV–DRS Data | Kubelka–Munk Method in OriginLab

In this tutorial, I’ll show you step by step how to calculate the optical band-gap energy (Eg) from Diffuse Reflectance Spectroscopy (UV–DRS) data using the Kubelka–Munk function in OriginLab. You will learn: ✅ How to convert reflectance data into the Kubelka–Munk function ✅ How to calculate photon energy (hv) from wavelength ✅ How to plot [F(R)⋅hv]^γ vs hv for both direct and indirect band gaps ✅ How to extract the band-gap energy (Eg) from the linear fit In my previous video, I explained the Tauc plot method for absorbance data. If you haven’t seen it yet, check it out here. ▶️ WATCH NEXT – RELATED TUTORIALS: • 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...   • Calculate Band Gap Energy from UV–Vis Data (Tauc Plot) →    • How to Calculate Band Gap Energy from UV–V...   👉 If this video helps you, don’t forget to like, comment, and subscribe to Nano Analysis Hub for more materials science and nanotechnology tutorials!