How to calculate Urbach energy from UV-Vis absorbance data in origin

Рет қаралды 21,512

2 жыл бұрын

#urbach #urbachenergy #sayphysics
How to calculate Urbach energy from UV-Vis absorbance data in origin
0:05 Urbach energy from UV-Vis absorbance data
0:50 Difference between the band gap energy and Urbach energy
03:00 What is Urbach energy
04:05 Derivation of the Urbach energy equation
05:45 Calculate Urbach energy from UV-Vis absorbance data in origin
OriginLab File Link:
drive.google.com/file/d/1zqxB...
In this KZfaq video, we will learn how to calculate Urbach energy from UV-Vis absorbance data in Origin, a powerful software tool for scientific data analysis and visualization. The Urbach energy is a parameter that characterizes the extent of disorder in a material and can provide valuable insights into its electronic structure and optical properties. By following along with the step-by-step instructions in the video, viewers will learn how to import their UV-Vis data into Origin, how to plot the data and fit it to an exponential function, and how to extract the Urbach energy from the resulting curve. The video will also provide tips and tricks for optimizing the analysis and interpreting the results. Whether you are a student, researcher, or simply interested in the fascinating world of materials science, this video is a must-watch for anyone interested in learning more about Urbach energy and its applications.
"Urbach energy calculation" "UV-Vis absorbance data analysis" "OriginLab tutorial" "Data plotting in OriginLab" "Spectroscopy analysis tutorial" "Optical bandgap calculation" "Semiconductor material analysis" "Materials science tutorial" "Photovoltaic device characterization" "Spectral analysis in OriginLab" "Absorption spectroscopy tutorial" "Urbach tail analysis" "Energy bandgap determination" "Materials research tutorial" "Scientific data analysis tutorial" "UV-Vis spectrophotometry tutorial" "Optical characterization of materials" "Energy gap analysis" "Photonic material analysis" "Materials engineering tutorial"
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How do you calculate Urbach energy from absorption?
How do you find the band gap energy from UV VIS?
How is band gap energy calculated?
How is the Tauc plot calculated?
A Study of the Optical Bandgap Energy and Urbach Energy
Determine Band Gap and Urbach Energy from UV
how to calculate band gap energy and Urbach energy
How to calculate band gap energy from UV-Vis absorption
Band gap energy from absorption data using the Tauc plot

Пікірлер: 39

@user-vy5hf4ei1x 2 жыл бұрын

THANK YOU SO MUCH

@SAYPhysics 2 жыл бұрын

You're welcome dear

@swarnadasari9681 13 күн бұрын

How can we calculate Urbach energy from Reflectance data? Thank you for your informative videos. 🙏👌

@SAYPhysics 13 күн бұрын

Calculating Urbach energy from UV-Vis reflectance data is possible but less straightforward than using absorbance data. Reflectance can be converted to absorbance using the Kubelka-Munk function or similar models. The accuracy depends on the reliability of this conversion and the quality of the reflectance data. Direct absorbance measurements are preferred for higher accuracy and simpler interpretation. Thanks

@swarnadasari9681 12 күн бұрын

@@SAYPhysics Thank you sir. Using the DRS technique, I got Reflectance data. Using Kebelka-Munk function, can I calculate the absorption coefficient and use it in Urbach energy calculations?

@nurulfatihahbtnorapandi4493 Жыл бұрын

THANK YOU SO MUCH SIR😭🫡

@SAYPhysics Жыл бұрын

You're welcome dear..

@dirgham7774 2 жыл бұрын

Extremely helpful. THank you for making a video on this.

@SAYPhysics 2 жыл бұрын

Glad it was helpful!

@veenavp8374 Жыл бұрын

Thank you

@SAYPhysics Жыл бұрын

Welcome dear

@SAYPhysics Жыл бұрын

Welcome dear

@gabrielfonseca4109 5 ай бұрын

Hi! Can you tell where are these images from? Or indicate any bibliography to study these concepts? Thank you, very much!

@SAYPhysics 5 ай бұрын

Please check the video description, links to the bibliography are being provided there. The data behind these plots (images) have also been provided in the video description. Thanks

@gabrielfonseca4109 5 ай бұрын

Sorry, I did not find the bibliography, just the link to the originlab data. I mean any book or article that explains this topic for me to cite in my dissertation. Thanks again. @@SAYPhysics

@gabrielfonseca4109 5 ай бұрын

Or the source of figures in time 0:55

@SAYPhysics 5 ай бұрын

The calculation of Urbach energy from UV-Vis absorbance data has been explored in various studies. Paleari 2007 (DOI: 10.1063/1.2794429) found that the Urbach energy values in fluorine-modified amorphous silica ranged between 50 and 66meV, indicating a reduction of dynamical disorder. Rai 2013 (DOI: 10.1063/1.4801900) analyzed the Urbach effect in undoped ZnO thin films, attributing it to impurities, structural disorders, and electron-phonon interaction. Croll 2002 (DOI: 10.1002/1521-3900(200209)187:13.0.CO;2-1) used UV spectroscopy to calculate the effective irradiation dosage during weathering, noting a non-linear relationship between UV absorption and damaging radiation. Sadigh 2011 (DOI: 10.1103/PHYSREVLETT.106.027401) conducted first-principles calculations of the Urbach tail in the optical absorption spectra of silica glass, confirming the exponential tails near the fundamental absorption edge. Thanks

@SAYPhysics 5 ай бұрын

I have taken these images from the Google Images. Thanks

@nazihaboudchicha8115 Жыл бұрын

To calculate the refractive index, we apply the law of bandgap and do not plot urbach energy?

@SAYPhysics Жыл бұрын

I'm not getting your question, would you please rephrase or elaborate? Thanks

@mushahidhussain2460 2 жыл бұрын

Sir if a graphs dont have any linearity then is it possible to find out these values?

@SAYPhysics 2 жыл бұрын

If it's a modified material, it must have Eu or otherwise. Thanks

@JK-xe3nu 4 ай бұрын

Hi Professor, nice tutorial!!!! in the fitting results, there are two intercept values, one is "x intercept" and another is "intercept". What does the "intercept" mean? (I assume if we have y=a+bx, the "X intercept" is the "a" and "slope" is the "b")

@SAYPhysics 4 ай бұрын

Thank you for your positive feedback on the tutorial, I'm glad you found it helpful! When the slope (b) is positive and the line intersects the x-axis (i.e., the x-intercept), it implies that the y-intercept must be negative. Conversely, if the slope is negative and the line intersects the x-axis, then the y-intercept will be positive. This relationship is a fundamental property of linear functions.

@faheemwani1996 Жыл бұрын

sir how to calculate dielectric relaxation time from UV data

@SAYPhysics Жыл бұрын

You will find some literature on it. However, I've not yet made a tutorial on it. Thanks

@kanchantiwari9182 Жыл бұрын

Sir, when should we calculate direct band gap and when should we calculate indirect band gap?

@SAYPhysics Жыл бұрын

We don't know this earlier unless the literature provides some information. When we do calculate it, we check whether it's a DB or IDB material. Thanks

@ayeshamajeed6682 Жыл бұрын

sir we plot graph between log of alpha and energy or natural log of alpha and energy

@SAYPhysics Жыл бұрын

Log of alpha vs energy. Thanks

@ayeshamajeed6682 Жыл бұрын

@@SAYPhysics thanks sir

@AkbarHussain-lv6xf 2 жыл бұрын

When it's necessary to calculate Urbach energy?

@SAYPhysics 2 жыл бұрын

When a material is modified such that interband levels are introduced, we calculate Urbach energy to assess the impurities role. Thanks

@shahnawaz8650 2 жыл бұрын

Best way

@SAYPhysics 2 жыл бұрын

Thanks dear

@gomaasoliman524 2 жыл бұрын

Thank you sir for the nice illustrations I hope if you kindly give some references links Also I'm interested in magnetic properties 🙏🙏🙏

@SAYPhysics 2 жыл бұрын

Thanks for the appreciation dear. In the video description, I have provided the reference. I'll cover magnetic characterizations as well in future, IA.

@gomaasoliman524 2 жыл бұрын

@@SAYPhysics Many thanks sir Jazaka Allahu khira

@SAYPhysics 2 жыл бұрын

You're welcome dear