Exciton Diffusion Length and Charge Extraction Yield in Organic Bilayer Solar Cells.
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.
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, 01062, Dresden, Germany.
Bernhard
B
Siegmund
Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK.
Muhammad T
MT
Sajjad
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, 01062, Dresden, Germany.
Johannes
J
Widmer
Department of Electrical Engineering, I.I.T. Madras, Chennai, 600036, India.
Debdutta
D
Ray
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, 01062, Dresden, Germany.
Christian
C
Koerner
Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, UK.
Moritz
M
Riede
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, 01062, Dresden, Germany.
Karl
K
Leo
Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK.
Ifor D W
ID
Samuel
Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, 01062, Dresden, Germany.
Koen
K
Vandewal
bilayer; charge carrier extraction; exciton diffusion length; organic photovoltaics; photocurrent modeling