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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.17: Poster

Monday, March 27, 2023, 18:00–20:00, P3

New insights into the P3HT:PCBM bulk-heterojunction — •Shahidul Alam¹, Christopher E. Petoukhoff¹, Haya Aldosary¹, Xinyu Jiang², Tomáš Váry³, Wejdan Althobaiti¹, Sandra P. Gonzalez Lopez¹, Wejdan Alsufyani¹, Peter Müller-Buschbaum², Vojtech Nádaždy⁴, Harald Hoppe⁵, and Frédéric Laquai¹ — ¹KAUST Solar Center (KSC), Kingdom of Saudi Arabia — ²TU Munich, Germany — ³STU Bratislava,Slovak Republic — ⁴Slovak Academy of Sciences, Bratislava, Slovak Republic — ⁵FSU Jena, Germany

Here, we studied the influence of thermal annealing on blends of well-known regio-random and regio-regular P3HT conjugated polymers and fullerene derivative [6,6]-phenyl-C60-butyric acid methyl ester (PC60BM). Several advanced microscopic and spectroscopic techniques were applied to investigate the thermal annealing effects on the structural, morphological, and energetic states, e.g., grazing-incidence wide-angle x-ray scattering, polarized light microscopy, hyperspectral photoluminescence spectroscopy, and photo-deflection spectroscopy. Furthermore, the blends' density of states (DOS) distribution was studied using energy resolved-electrochemical impedance spectroscopy. Coupled transfer matrix methods and drift-diffusion simulations were employed to see the impact of DOS on the solar cells' device parameters.