Welcome to the documentation of AFMD’s sEQE setup !

The documentation contains the full hardware, software and handling requirements to rebuild and use the sensitive external quantum efficiency (sEQE) setup of the AFMD Group.

What is this Project about ?

This project is about a common technique in solar cell research to probe a solar cell’s photocurrent upon illumination. The measured photocurrent can be used to calculate the so called external quantum efficiency (EQE) of the solar cell, which is a parameter for the solar cells performance:

\[\text{EQE} = \frac{\text{electron-hole pairs per sec}}{\text{photons per sec}}\]

For further background knowledge the interested reader is refered to:

  1. Who is the AFMD group ?

  2. What is a Solar cell ?

  3. Why do we measure EQE ?

The sEQE setup is an experimental setup built by Dr. Anna Jungbluth to provide a research group with the means to evaluate one of their own solar cell device’s performance parameters. It is capable of reaching an EQE sensitivity of \(10^{-6}\) . Furthermore has Dr. Anna Jungbluth written a program to extract the relevant solar cell parameter from the sEQE measurements which can be found under sEQE-Analysis-Software.

Where is this Project going ?

The sEQE setup is maintained by Ming Zhu. There are many ideas for its future development some of which are:

  1. [X] Integrating and automating a cryostate

  2. [ ] Integrating a light bias source

Feel free to reach out to Ming Zhu or the AFMD group if you have any feedback, ideas for future developments or questions.

Contents:

Indices and tables