Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 39: Organic Photovoltaics II
CPP 39.2: Vortrag
Mittwoch, 14. März 2018, 10:00–10:15, C 243
A Shockley-type polymer:fullerene solar cell — •Safa Shoaee1, Ardalan Armin2, Zhiming Chen3, Yaocheng Jin3, Kai Zhang3, and Fei Huang3 — 1Optoelectronics of Organic Semiconductors, Institute for Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany — 2Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, St Lucia Campus, Brisbane 4072, Australia — 3Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China.
Despite the myriad of organic donor:acceptor materials, only few systems have emerged in the life of organic solar cells to exhibit considerable reduced bimolecular recombination. Charge extraction rate in such devices is typically slow due to their low charge carrier mobility. Herein, we investigate charge transport and recombination properties of a ~10% efficient polymer (NT812):fullerene blend which delivers ~9% power conversion efficiency even when the junction thickness is as large as 800 nm. Experimental results indicate that this material system exhibits exceptionally low bimolecular recombination constant, 800 times smaller than the diffusion-controlled electron and hole encounter rate with nearly ideal charge collection. This is the first realization of high efficiency Shockley-type organic solar cells with junction thicknesses suitable for scaling-up.