Organic Light-Emitting Diodes Based on Phthalimide Derivatives: Improvement of the Electroluminescence Properties

Frederic Dumur (1) , Malika Ibrahim-Ouali (2) , Didier Gigmes (1)

1 ICR - Institut de Chimie Radicalaire
2 ISM2 - Institut des Sciences Moléculaires de Marseille

In this study, a phthalimide-based fluorescent material has been examined as a green emitter for multilayered organic light-emitting diodes (OLEDs). By optimizing the device stacking, a maximum brightness of 28,450 cd/m 2 at 11.0 V and a maximum external quantum efficiency of 3.11% could be obtained. Interestingly, OLEDs fabricated with Fluo-2 presented a 20-fold current efficiency improvement compared to the previous results reported in the literature, evidencing the crucial role of the device stacking in the electroluminescence (EL) performance of a selected emitter. Device lifetime was also examined and an operational stability comparable to that reported for a standard triplet emitter i.e., bis(4-methyl-2,5-diphenyl-pyridine)iridium(III) acetylacetonate [(mdppy) 2 Iracac] was evidenced.

Mots clés: OLED; fluorescence; phosphorescence; green; device architecture

Domaines: Chimie organique; Electronique

Frederic Dumur, Malika Ibrahim-Ouali, Didier Gigmes. Organic Light-Emitting Diodes Based on Phthalimide Derivatives: Improvement of the Electroluminescence Properties. Applied Sciences, 2018, 8 (4), pp.539. ⟨10.3390/app8040539⟩. ⟨hal-02091463⟩