By tuning some of the properties of the organic polymers, used in the fabrication of organic solar cells, such as its molecular weight, researchers have found an increase of power conversion efficiency three-times higher. This has led to efficiencies exceeding 10 % in solar cells produced with the blade-coating system.

This increased efficiency is seen both by thin and thick active layers. 

Also, the higher the molecular weight of the polymers used, the higher the thermal stability, making these solar cells more durable, which is important for outdoor applications of these materials. 

This research, which is part of the TERRA project, showcases the potential of integrating organic photovoltaics into urban infrastructure, such as bus shelters, to harness diffuse sunlight and contribute to sustainable urban energy solutions.

For more details, watch our video in ENGLISH or in CATALAN.

Find more information in the related article: 

High Polymer Molecular Weight Yields Solar Cells with Simultaneously Improved Performance and Thermal Stability
Sergi Riera-Galindo, Marta Sanz-Lleó, Edgar Gutiérrez-Fernández, Nicolás Ramos, Marta Mas-Torrent, Jaime Martín, Laura López-Mir, Mariano Campoy-Quiles
Small 2024, 20, 2311735
DOI: 10.1002/smll.202311735

The TERRA project was awarded to researcher Sergi Riera-Galindo in one of the calls by the Ajuntament de Barcelona.