A new spectroscopic method to understand the physical principles of organic PV

A German research team claims to have created a new visualization technique it says can enable detailed mapping of the energetic landscapes of organic PV cells on a nano scale. The technique could lead to organic cells with reduced power losses.

August 15, 2019 Emiliano Bellini

An artistic representation of an energetic landscape determining the movement of photo-induced positive (h+) and negative (e-) charges in PV devices.

Image- Yana Vaynzof

From pv magazine Global

Researchers at the Center for Advanced Materials at Heidelberg University in Germany have created a new spectroscopic method they say enables detailed visualization of the energetic landscape inside organic solar cells.

The scientists claim the technique will provide a more extensive insight into the physical principles of organic PV technology while improving understanding of how energy losses occur.

“Until now, visualizing these energetic landscapes was so challenging that only rough estimates could be used to study the fundamental processes in organic photovoltaic devices,” the research team stated.

The researchers say the new method enables a more detailed map of energetic landscapes on a nano scale and is applicable at any period of a cell’s lifetime.

“Without mapping the energetic landscapes, it is difficult to understand how and why devices lose energy in the process of converting light into electricity,” said research coordinator Yana Vaynzof.

She added, the technique could enable the development of a new generation of organic PV cells with lower power losses.

Research into organic PV has driven several recent studies including papers produced by Russia’s Skolkovo Institute of Science and Technology, the U.S. Department of Energy’s Lawrence Berkeley Laboratory, and the University of Birmingham, in the U.K., with the University of Utrecht, in the Netherlands.

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