Transcription of The Use of UV-visible Spectroscopy to Measure the Band …
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The Use of UV-visible Spectroscopy to Measure the Band …
1 The Use of UV-visible Spectroscopy to Measure the Band Gap of a Semiconductor Zhebo Chen and Thomas F. Jaramillo Department of Chemical Engineering, Stanford University Edited by Bruce Brunschwig 09/19/2017 Section 1: Introduction to UV-Vis Spectroscopy In ultraviolet - visible light (UV-vis) spectroscopic, light absorption is measured as a function of wavelength. The spectrum provides information about electronic transitions occurring in the material. The Beer-Lambert law states that the Transmittance, , the light transmitted (IT) over the incident intensity (I0), is dependent on the path length of the light through the sample (l), the absorption cross section (s) of the sample s transition, and the difference in the population of the initial state (Nl) and final state (N2), Equation
The Use of UV-visible Spectroscopy to Measure the Band Gap of a Semiconductor Zhebo Chen and Thomas F. Jaramillo Department of Chemical Engineering, Stanford University Edited by Bruce Brunschwig 09/19/2017 Section 1: Introduction to UV-Vis spectroscopy In ultraviolet-visible light (UV-vis) spectroscopic, light absorption is measured as
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