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Exciton Diffusion Length and Charge Extraction Yield in Organic Bilayer Solar Cells
Bernhard Siegmund1, Muhammad T Sajjad2, Johannes Widmer1
1Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, 01062, Dresden, Germany.
None:
A method for resolving the diffusion length of excitons and the extraction yield of charge carriers is presented based on the performance of organic bilayer solar cells and careful modeling. The technique uses a simultaneous variation of the absorber thickness and the excitation wavelength. Rigorously differing solar cell structures as well as independent photoluminescence quenching measurements give consistent results.
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