Regensburg 2022 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster 1
CPP 12.60: Poster
Monday, September 5, 2022, 18:00–20:00, P1
P3HT:PCBM Polymer Solar Cells from a Didactive Perspective — •Shahidul Alam1, Aman Anand2, Md Moidul Islam2, Rico Meitzner2, Aurelien Sokeng Djoumessi2, Josef Slowik2, Zekarias Teklu2, Peter Fischer3, Christian Kästner3, Jafar I. Khan1, Ulrich S. Schubert2, Frédéric Laquai1, and Harald Hoppe1 — 1King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), Kingdom of Saudi Arabia — 2Friedrich Schiller University Jena, Germany — 3Ilmenau University of Technology, Germany
In this work, we studied the influence annealing process on the performance of the common polymer:fullerene bulk heterojunction solar cells with conventional architecture, comprising P3HT:PC60BM blend as a photoactive layer. The non-annealed active layer device exhibited a power conversion efficiency of less than 1%, which was significantly lower than the pre and post-annealed device. In order to investigate the impact of pre and post thermal annealing on the natural morphological state of the polymer, regiorandom and regioregular type P3HT were used in photoactive layers. Changes in solar cell performance were associated with different extraction probabilities due to changed annealing conditions. Several spectroscopic techniques like EL, SS-PL, and TR-PL were employed to comprehend the phenomenon of charge photogeneration processes. Finally, to explore the morphological changes upon annealing, AFM and ELI measurements were performed on films and solar cells, respectively.