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Exciton Diffusion Length and Charge Extraction Yield in Organic Bilayer Solar Cells
Author(s) -
Siegmund Bernhard,
Sajjad Muhammad T.,
Widmer Johannes,
Ray Debdutta,
Koerner Christian,
Riede Moritz,
Leo Karl,
Samuel Ifor D. W.,
Vandewal Koen
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201604424
Subject(s) - organic solar cell , diffusion , materials science , bilayer , exciton , yield (engineering) , photoluminescence , charge carrier , quenching (fluorescence) , solar cell , extraction (chemistry) , charge (physics) , optoelectronics , optics , condensed matter physics , membrane , physics , chemistry , thermodynamics , polymer , biochemistry , quantum mechanics , composite material , chromatography , metallurgy , fluorescence
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.