Calculate the lifetime mobility product μτ

[Natalie89]

Hello,

I am trying to calculate the lifetime mobility product μτ for a project. In order to do this I need to calculate the photogeneration. Therefore I need the light intensity and absorption coefficients. I understand how to calculate light intensity, and I have come up with an experiment to try. I do not fully understand what an absorption coefficient is, or how to find/estimate it.

If anyone understands this principle, please let me know. I am not looking for a solution necessarily, but just a general understanding of absorption coefficients or photogeneration would be greatly appreciated.

Thanks!

 

[eljose79]

Hello,

Thank you for reaching out for help with your project. The absorption coefficient is a measure of how much light a material can absorb at a given wavelength. It is typically represented by the symbol α and has units of inverse length (cm^-1). It is an important factor to consider in photogeneration as it determines the efficiency of the absorption of light by a material. The higher the absorption coefficient, the more light the material can absorb, resulting in a higher photogeneration rate.

To estimate the absorption coefficient for your project, you can research the material you are working with and look for its optical properties, specifically its absorption spectrum. This will give you an idea of how much light the material absorbs at different wavelengths. You can also conduct experiments to measure the absorption coefficient, such as the Beer-Lambert Law experiment.

I hope this helps you understand the concept of absorption coefficients and how they relate to photogeneration. Best of luck with your project!