Correct determination of charge transfer state energy from luminescence spectra in organic solar cells - Aix-Marseille Université Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2018

Correct determination of charge transfer state energy from luminescence spectra in organic solar cells

Résumé

Generation and recombination of electrons and holes in organic solar cells occurs via charge transfer states located at the donor/acceptor interface. The energy of these charge transfer states is a crucial factor for the attainable open-circuit voltage and its correct determination is thus of utmost importance for a detailed understanding of such devices. This work reports on drastic changes of electroluminescence spectra of bulk heterojunction organic solar cells upon variation of the absorber layer thickness. It is shown that optical thin-film effects have a large impact on optical out-coupling of luminescence radiation for devices made from different photoactive materials, in configurations with and without indium tin oxide. A scattering matrix approach is presented which accurately reproduces the observed effects and thus delivers the radiative recombination spectra corrected for the wavelength-dependent out-coupling. This approach is proven to enable the correct determination of charge transfer state energies.
Fichier principal
Vignette du fichier
Paper Nature communication.pdf (1.28 Mo) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

hal-01901500 , version 1 (22-10-2018)

Licence

Paternité

Identifiants

Citer

Mathias List, Tanmoy Sarkar, Pavlo Perkhun, Jörg Ackermann, Chieh Luo, et al.. Correct determination of charge transfer state energy from luminescence spectra in organic solar cells. Nature Communications, 2018, 9 (1), ⟨10.1038/s41467-018-05987-8⟩. ⟨hal-01901500⟩
835 Consultations
230 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More