Zhuo Xu, Jose Prince Madalaimuthu, Josef Bernd Slowik, Rico Meitzner, Aman Anand, Shahidul Alam, Héctor Corte, Steffi Stumpf, Ulrich S. Schubert, Harald Hoppe
Solar energy is a renewable source of energy with the potential to replace fossil fuels in the future. One type of solar cell is the perovskite solar cell. These cells have an electron transport layer (ETL) that helps collect photogenerated electrons from the perovskite layer to the bottom electrode of the solar cell, while also preventing recombination of light-generated electrons. In a study by the Laboratory of Organic and Macromolecular Chemistry (IOMC) at the Friedrich Schiller University Jena, a hybrid electron transport layer made of organic PDINO and inorganic titanium oxide (TiOx) was used in both fullerene and nonfullerene-based organic solar cells. The results, published in the journal Advanced Materials Interfaces, showed that the PDINO:TiOx blend ETL consistently improved the performance of these solar cells. This improvement may be due to better light and energy level management. AFM and SEM results also showed that the PDINO:TiOx blend ETL had a more flat and homogeneous film morphology, potentially leading to improved charge collection.