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Identifying the origin of delayed electroluminescence in a polariton organic light-emitting diode




TekijätAbdelmagid Ahmed Gaber, Qureshi Hassan A., Papachatzakis Michael A., Siltanen Olli, Kumar Manish, Ashokan Ajith, Salman Seyhan, Luoma Kimmo, Daskalakis Konstantinos S.

KustantajaWALTER DE GRUYTER GMBH

KustannuspaikkaBERLIN

Julkaisuvuosi2024

JournalNanophotonics

Tietokannassa oleva lehden nimiNANOPHOTONICS

Lehden akronyymiNANOPHOTONICS-BERLIN

Vuosikerta13

Numero14

Aloitussivu2565

Lopetussivu2573

Sivujen määrä9

ISSN2192-8606

eISSN2192-8614

DOIhttps://doi.org/10.1515/nanoph-2023-0587

Verkko-osoitehttps://doi.org/10.1515/nanoph-2023-0587

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/detail/Publication/387067117


Tiivistelmä
Modifying the energy landscape of existing molecular emitters is an attractive challenge with favourable outcomes in chemistry and organic optoelectronic research. It has recently been explored through strong light-matter coupling studies where the organic emitters were placed in an optical cavity. Nonetheless, a debate revolves around whether the observed change in the material properties represents novel coupled system dynamics or the unmasking of pre-existing material properties induced by light-matter interactions. Here, for the first time, we examined the effect of strong coupling in polariton organic light-emitting diodes via time-resolved electroluminescence studies. We accompanied our experimental analysis with theoretical fits using a model of coupled rate equations accounting for all major mechanisms that can result in delayed electroluminescence in organic emitters. We found that in our devices the delayed electroluminescence was dominated by emission from trapped charges and this mechanism remained unmodified in the presence of strong coupling.

Ladattava julkaisu

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