To identify efficient molecules for PV cells

As researchers work to improve the photovoltaic (PV) panels of the future, an international team, led by Prof. Jürgen Hauer of the Technical University of Munich (TUM),  has determined the spectral properties of individual molecules. The researchers acquired the absorption and emission spectra of the investigated molecules over a broad spectral range in a single measurement to accurately determine how the molecules interact with their environment, capturing and releasing energy. Normally, these kinds of measurements are averaged over thousands, even millions of molecules, sacrificing important detail information. This will accelerate the identification of efficient molecules for future PV technologies. The system generates a double laser pulse with a controlled delay in between. The second pulse modulates the emission spectrum in a specific manner, which in turn provides information about the absorption spectrum. This information is then evaluated using a Fourier transformation.

Contact Prof. Dr. Jürgen Hauer, TUM, juergen.hauer@tum.de

 

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