Hot Topics Session 2
In the first talk of the second Hot Topics Session Prof. Zuo Xiao reviews the development of non-fullerene acceptors and polymer donors towards the current certified record OPV cells with efficiencies >18% in a single junction. For the donors the most promising materials are fused ring polymers. With D18:Y6 the efficiency could be pushed beyond 18% with <87% EQE in the maximum.
![Path towards high efficiency OPV](https://www.ngse.info/wp-content/uploads/2020/12/Hottopics2-Xiao1-1024x669.jpg)
In her talk titled “Elucidating the full potential of OPV materials with AMANDA and machine learning” Dr. Xiaoyan Du from the Helmholtz Institute Erlangen-Nuremberg reports on her work combining Automation together with Machine learning in order to investigate the effect of molecular engineering on photostability. To do this she investigated a large number of cell variations based on PM6:Y6 and analyzed their performance in efficiency and stability with Gaussian Process Regression.
![High Throughput Investigations of OPV](https://www.ngse.info/wp-content/uploads/2020/12/Hottopics2-Du2-1024x671.jpg)
In the last contribution of the session Prof. James Durrant compares the charge carrier dynamics between OPV and Perovskite solar cells. He finds a number of similarities, while also pointing out key differences.
![OPV vs. Perovskite by James Durrant](https://www.ngse.info/wp-content/uploads/2020/12/Hottopics2-Durrant3-1024x679.jpg)