Master Thesis - Development of a TCSPC measurement strategy for optimization of information con[...]

For characterisation of active photovoltaic absorber materials various advanced optical characterization methods are used to monitor photo-physical material properties. With increasing interest in research on high throughput characterization of perovskites, the need for an accelerated measurement strategy arises. In our subinstitute IMD-3, tr-PL (transient photoluminescence) measurements are commonly used to assess material properties. However, a high dynamic range is needed making the characterization method tedious and time consuming. This thesis focuses on evaluating how TCSPC (Time-Correlated Single Photon Counting) measurements at different fluences can be used to extract as much information as possible w.r.t. the information content achieved via tr-PL (transient photoluminescence) measurements. The project aims to quantify the information content (measured e.g. via Shannon entropy or Kullback-Leibler divergence) vs. measurement time.

Your Job:

• Literature research on /Familiarization with the topic of tr-PL and TCSPC and perovskite PV
  
• Familiarization with the measurement equipment and set‑ups
  
• Qualitative measurement of the tr‑PL of charge carriers in a range of perovskite samples
  
• Qualitative TCSPC measurements for a range of perovskite samples under varying fluences
  
• Quantification of the information content measured via Shannon entropy or Kullback‑Leibler divergence vs. measurement time
  
• Analysis and documentation of the results
  

Your Profile:

• Excellent academic performance in a master’s program in electrical engineering, materials science, physics, or a related field
  
• Basic knowledge of perovskite PV or semiconductor physics
  
• Initial experience in with an object‑oriented programming language (e.g., Python, Matlab)
  
• Analytical and structured thinking
  
• Fluent written and spoken English or German
  

Our Offer:

We work on the very latest issues that impact our society and are offering you the chance to actively help in shaping the change! We support you in your work with:

• MEANINGFUL TASKS: Your thesis deals with a future-oriented, socially relevant topic with direct practical relevance in an international environment
  
• SCIENTIFIC ENVIRONMENT: You can expect excellent scientific equipment, modern technologies, and qualified support from experienced colleagues
  
• HEALTH & WELL-BEING: Your health is important to us. You can look forward to a comprehensive company health management programme with a wide range of options, including a beach volleyball court, running groups, yoga classes and much more. In addition, our company medical service and an experienced social counselling team are available to assist you on site
  
• FAIR REMUNERATION: We will pay you a reasonable remuneration for your thesis
  
• FIXED-TERM: The position is initially for a fixed term of 6 months
  

In addition to exciting tasks and a collegial working environment, we offer you much more:

We welcome applications from people with diverse backgrounds, e.g. in terms of age, gender, disability, sexual orientation / identity, and social, ethnic and religious origin. A diverse and inclusive working environment with equal opportunities in which everyone can realise their potential is important to us.

The following links provide further information on diversity and equal opportunities: and on specific support options:

We look forward to receiving your application. The job will be advertised until the position has been successfully filled. You should therefore submit your application as soon as possible.